Beat Knechtle

Summary

Affiliation: St Gallen
Country: Switzerland

Publications

  1. pmc Changes in body core and body surface temperatures during prolonged swimming in water of 10°C-a case report
    Christoph Alexander Rüst
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    Extrem Physiol Med 1:8. 2012
  2. pmc Analysis of sex differences in open-water ultra-distance swimming performances in the FINA World Cup races in 5 km, 10 km and 25 km from 2000 to 2012
    Matthias Alexander Zingg
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    BMC Sports Sci Med Rehabil 6:7. 2014
  3. pmc Participation and performance trends in multistage ultramarathons-the 'Marathon des Sables' 2003-2012
    Christoph Knoth
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    Extrem Physiol Med 1:13. 2012
  4. pmc Sex-related differences and age of peak performance in breaststroke versus freestyle swimming
    Mathias Wolfrum
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    BMC Sports Sci Med Rehabil 5:29. 2013
  5. pmc Changes in foot volume, body composition, and hydration status in male and female 24-hour ultra-mountain bikers
    Daniela Chlíbková
    Institute of General Practise and for Health Services Research, University of Zurich, Zurich, Switzerland
    J Int Soc Sports Nutr 11:12. 2014
  6. pmc Age and gender difference in non-drafting ultra-endurance cycling performance - the 'Swiss Cycling Marathon'
    Matthias Zingg
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, 8091, Switzerland
    Extrem Physiol Med 2:18. 2013
  7. pmc Participation and performance trends of East-African runners in Swiss half-marathons and marathons held between 2000 and 2010
    Marco Cribari
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    BMC Sports Sci Med Rehabil 5:24. 2013
  8. pmc Participation and performance trends in 'Ultraman Hawaii' from 1983 to 2012
    Dimirela Meili
    Institute of General Practice and for Health Services Research, University of Zurich, Pestalozzistrasse 24, Zurich 8091, Switzerland
    Extrem Physiol Med 2:25. 2013
  9. pmc Sex difference in Double Iron ultra-triathlon performance
    Katrin Sigg
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    Extrem Physiol Med 2:12. 2013
  10. pmc Sex difference in race performance and age of peak performance in the Ironman Triathlon World Championship from 1983 to 2012
    Christoph A Rüst
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, 8091, Switzerland
    Extrem Physiol Med 1:15. 2012

Collaborators

  • Thomas Rosemann
  • Romuald Lepers
  • Oliver Senn
  • Gotz Kohler
  • A Wirth
  • Reinhard Imoberdorf
  • Vincent O Onywera
  • Matthias Fenzl
  • Shila Pazahr
  • Marco Toigo
  • Michael Meyer
  • R Kaul
  • Raul Bescos
  • Christoph Alexander Rüst
  • Patrizia Knechtle
  • Christoph A Rüst
  • Matthias Alexander Zingg
  • Daniela Chlíbková
  • Michael Stiefel
  • Matthias A Zingg
  • Klaus Karner-Rezek
  • Matthias Zingg
  • Alena Zakovska
  • Laura Peter
  • Ivana Tomásková
  • Martin Bischof
  • Katrin Sigg
  • Dimirela Meili
  • Kristina da Fonseca-Engelhardt
  • Saskia Carolin Jampen
  • Mathias Wolfrum
  • Uwe Teutsch
  • F Etter
  • Marco Cribari
  • Christoph Knoth
  • Wiebke Schmid
  • Alexia Bracher
  • Caroline Cejka
  • Uwe H W Schütz
  • Lutz Herbst
  • Marcus Shortall
  • Iva Tomaskova
  • Christian Schlegel
  • Joeri Gredig
  • Peter Matthias Mundinger
  • Fabian Morsbach
  • C A Rüst
  • Walter Wiesner
  • Andreas Gutzeit
  • Manuela Konrad
  • Bruno Lutz
  • Christian Billich
  • Martin Ehrhardt
  • Wolfgang Freund
  • Markus Gnädinger
  • Heike Wiedelbach
  • Jolanda Bürge
  • Ingo Schulze
  • Hans Jürgen Brambs
  • Felix Wermelinger
  • Horst Brunner
  • Stefan Gröninger
  • Ursula Barandun
  • Jürgen Machann
  • Arno Schmidt-Trucksäss
  • Oscar Salas Fraire
  • Jorge Luis Andonie
  • Carlos Luis Lopez

Detail Information

Publications139 found, 100 shown here

  1. pmc Changes in body core and body surface temperatures during prolonged swimming in water of 10°C-a case report
    Christoph Alexander Rüst
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    Extrem Physiol Med 1:8. 2012
    ..This case report describes an experienced open-water ultra-endurance athlete swimming in water of 9.9°C for 6 h and 2 min...
  2. pmc Analysis of sex differences in open-water ultra-distance swimming performances in the FINA World Cup races in 5 km, 10 km and 25 km from 2000 to 2012
    Matthias Alexander Zingg
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    BMC Sports Sci Med Rehabil 6:7. 2014
    ..The present study investigated the changes in swimming speeds and sex differences for elite male and female swimmers competing in 5 km, 10 km and 25 km open-water FINA World Cup races held between 2000 and 2012...
  3. pmc Participation and performance trends in multistage ultramarathons-the 'Marathon des Sables' 2003-2012
    Christoph Knoth
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    Extrem Physiol Med 1:13. 2012
    ..The purpose of this study was to investigate participation and performance changes in the multistage ultramarathon 'Marathon des Sables' from 2003 to 2012...
  4. pmc Sex-related differences and age of peak performance in breaststroke versus freestyle swimming
    Mathias Wolfrum
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    BMC Sports Sci Med Rehabil 5:29. 2013
    ..However, little is known about the sex-related differences in other swimming styles. The aim of the present study was to compare performance and age of peak performance for elite men and women swimmers in breaststroke versus freestyle...
  5. pmc Changes in foot volume, body composition, and hydration status in male and female 24-hour ultra-mountain bikers
    Daniela Chlíbková
    Institute of General Practise and for Health Services Research, University of Zurich, Zurich, Switzerland
    J Int Soc Sports Nutr 11:12. 2014
    ..The present study investigated changes in foot volume, body composition, and hydration status in male and female 24-hour ultra-mountain bikers...
  6. pmc Age and gender difference in non-drafting ultra-endurance cycling performance - the 'Swiss Cycling Marathon'
    Matthias Zingg
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, 8091, Switzerland
    Extrem Physiol Med 2:18. 2013
    ....
  7. pmc Participation and performance trends of East-African runners in Swiss half-marathons and marathons held between 2000 and 2010
    Marco Cribari
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    BMC Sports Sci Med Rehabil 5:24. 2013
    ..This study examined the changes in participation, performance and age of East African runners competing in half-marathons and marathons held in Switzerland between 2000 and 2010...
  8. pmc Participation and performance trends in 'Ultraman Hawaii' from 1983 to 2012
    Dimirela Meili
    Institute of General Practice and for Health Services Research, University of Zurich, Pestalozzistrasse 24, Zurich 8091, Switzerland
    Extrem Physiol Med 2:25. 2013
    ..The aims of this study were to analyze (1) changes in participation and performance, (2) sex-related differences in overall and split time performances, and (3) the age of peak performance in Ultraman Hawaii...
  9. pmc Sex difference in Double Iron ultra-triathlon performance
    Katrin Sigg
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    Extrem Physiol Med 2:12. 2013
    ..The present study examined the sex difference in swimming (7.8 km), cycling (360 km), running (84 km), and overall race times for Double Iron ultra-triathletes...
  10. pmc Sex difference in race performance and age of peak performance in the Ironman Triathlon World Championship from 1983 to 2012
    Christoph A Rüst
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, 8091, Switzerland
    Extrem Physiol Med 1:15. 2012
    ..This study investigated the change in sex difference in both race performance and the age of peak performance across years in the top ten athletes for split disciplines and overall race time in the 'Ironman Hawaii' between 1983 and 2012...
  11. pmc Analysis of swimming performance in FINA World Cup long-distance open water races
    Matthias Alexander Zingg
    Facharzt FMH fur Allgemeinmedizin, Gesundheitszentrum St, Gallen, Vadianstrasse 26, St, Gallen, 9001 Switzerland
    Extrem Physiol Med 3:2. 2014
    ..The present study investigated the age and swimming performance of elite ultra-distance swimmers competing in the 5-, 10- and 25-km Fédération Internationale de Natation (FINA) World Cup swimming events...
  12. pmc Master runners dominate 24-h ultramarathons worldwide-a retrospective data analysis from 1998 to 2011
    Matthias Zingg
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    Extrem Physiol Med 2:21. 2013
    ..The aims of the present study were to examine (a) participation and performance trends and (b) the age of peak running performance in master athletes competing in 24-h ultra-marathons held worldwide between 1998 and 2011...
  13. pmc Participation and performance trends in ultra-endurance running races under extreme conditions - 'Spartathlon' versus 'Badwater'
    Kristina da Fonseca-Engelhardt
    Gesundheitszentrum St, Gallen, St, Gallen, 9000, Switzerland
    Extrem Physiol Med 2:15. 2013
    ..The aim of the present study was to compare the trends in participation, performance and age of finishers in 'Badwater' and 'Spartathlon' as two of the toughest ultramarathons in the world of more than 200 km of distance...
  14. pmc The prevalence of exercise-associated hyponatremia in 24-hour ultra-mountain bikers, 24-hour ultra-runners and multi-stage ultra-mountain bikers in the Czech Republic
    Daniela Chlíbková
    Institute of General Practise and for Health Services Research, University of Zurich, Zurich, Switzerland
    J Int Soc Sports Nutr 11:3. 2014
    ....
  15. pmc The age of peak performance in Ironman triathlon: a cross-sectional and longitudinal data analysis
    Michael Stiefel
    Institute of General Practice and for Health Services Research, University of Zurich, Pestalozzistrasse 24, Zurich 8091, Switzerland
    Extrem Physiol Med 2:27. 2013
    ....
  16. pmc Performance trends in master freestyle swimmers aged 25-89 years at the FINA World Championships from 1986 to 2014
    Beat Knechtle
    Gesundheitszentrum St Gallen, Vadianstrasse 26, 9001, St Gallen, Switzerland
    Age (Dordr) 38:18. 2016
    ..We expect a continuous trend in increasing participation and improved performance in master freestyle swimmers. ..
  17. pmc What is the age for the fastest ultra-marathon performance in time-limited races from 6 h to 10 days?
    Beat Knechtle
    Gesundheitszentrum St Gallen, Vadianstrasse 26, 9001, St Gallen, Switzerland
    Age (Dordr) 36:9715. 2014
    ..The age of peak ultra-marathon performance increased with increasing race duration and with increasing number of finishes. These athletes improved race performance with increasing number of finishes...
  18. pmc Polymyalgia rheumatica in a married couple
    Christoph Alexander Rüst
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    Int J Gen Med 5:711-4. 2012
    ..The interval of the diagnosis between the spouses ranged from 0 to 89 months. Although in most of the previous case reports a genetic disposition and an infectious agent have been discussed, this hypothesis must be questioned...
  19. pmc Predictor variables for marathon race time in recreational female runners
    Wiebke Schmid
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Asian J Sports Med 3:90-8. 2012
    ..We intended to determine predictor variables of anthropometry and training for marathon race time in recreational female runners in order to predict marathon race time for future novice female runners...
  20. pmc Age-related changes in ultra-triathlon performances
    Beat Knechtle
    Gesundheitszentrum St, Gallen, Vadianstrasse 26, St, Gallen, 9011, Switzerland
    Extrem Physiol Med 1:5. 2012
    ..4-km swimming, 540-km cycling and 126.6-km running) and Deca Iron ultra-triathlon (38-km swimming, 1,800-km cycling and 420-km running)...
  21. pmc The Relationship between Anthropometry and Split Performance in Recreational Male Ironman Triathletes
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Asian J Sports Med 2:23-30. 2011
    ..The aim of this study was to investigate the relation between anthropometric variables and total race time including split times in 184 recreational male Ironman triathletes...
  22. pmc Exercise electrocardiogram testing in two brothers with different outcome - a case study exercise testing in master cyclists
    Christoph Alexander Rüst
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    Int J Gen Med 6:495-501. 2013
    ..In master athletes with asymptomatic exercise electrocardiogram but a positive family history, further examinations should be performed in order to detect relevant stenosis in coronary arteries. ..
  23. pmc Changes in Skinfold Thicknesses and Body Fat in Ultra-endurance Cyclists
    Martin Bischof
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    Asian J Sports Med 4:15-22. 2013
    ..The present study investigated the changes in single skinfold thicknesses and body fat during an ultra-endurance cycling race...
  24. pmc Participation and Performance Trends in Triple Iron Ultra-triathlon - a Cross-sectional and Longitudinal Data Analysis
    Christoph Alexander Rüst
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    Asian J Sports Med 3:145-52. 2012
    ..4 km swimming, 540 km cycling and 126.6 km running) across years from 1988 to 2011...
  25. pmc Analysis of participation and performance in athletes by age group in ultramarathons of more than 200 km in length
    Matthias A Zingg
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    Int J Gen Med 6:209-20. 2013
    ..Participation and performance trends for athletes by age group have been investigated for marathoners and ultramarathoners competing in races up to 161 km, but not for longer distances of more than 200 km...
  26. pmc A comparison of participation and performance in age-group finishers competing in and qualifying for Ironman Hawaii
    Michael Stiefel
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich
    Int J Gen Med 6:67-77. 2013
    ..Athletes intending to compete in Ironman Hawaii need to qualify in an age-group based qualification system. We compared participation and top ten performances of athletes in various age groups between Ironman Hawaii and its qualifier races...
  27. pmc Reduced performance difference between sexes in master mountain and city marathon running
    Matthias A Zingg
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    Int J Gen Med 6:267-75. 2013
    ..This study examined changes in the sex differences in performance across time in female and male master runners competing in a mountain marathon compared to a flat city marathon...
  28. pmc Is body fat a predictor of race time in female long-distance inline skaters?
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Asian J Sports Med 1:131-6. 2010
    ..The aim of this study was to evaluate predictor variables of race time in female ultra-endurance inliners in the longest inline race in Europe...
  29. pmc Age group athletes in inline skating: decrease in overall and increase in master athlete participation in the longest inline skating race in Europe - the Inline One-Eleven
    Uwe Teutsch
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    Int J Gen Med 6:345-55. 2013
    ..The aim of this study was to investigate trends in participation, age, and performance in the longest inline race in Europe, the Inline One-Eleven over 111 km, held between 1998 and 2009...
  30. pmc Does Muscle Mass Affect Running Times in Male Long-distance Master Runners?
    Beat Knechtle
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Asian J Sports Med 3:247-56. 2012
    ..The aim of the present study was to investigate associations between skeletal muscle mass, body fat and training characteristics with running times in master athletes (age > 35 years) in half-marathon, marathon and ultra-marathon...
  31. pmc Increase in finishers and improvement of performance of masters runners in the Marathon des Sables
    Saskia Carolin Jampen
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    Int J Gen Med 6:427-38. 2013
    ..The aim of the study was to examine finisher and performance trends of ultrarunners in the Marathon des Sables, the world's largest multistage ultramarathon...
  32. pmc Analysis of performance and age of the fastest 100-mile ultra-marathoners worldwide
    Christoph Alexander Rüst
    University of Zurich, Institute of General Practice and for Health Services Research, Zurich, Switzerland
    Clinics (Sao Paulo) 68:605-11. 2013
    ..The purpose of this study was to examine the changes in running performance and the age of peak running performance of the best 100-mile ultra-marathoners worldwide...
  33. pmc The effects of an 8-week multicomponent inpatient treatment program on body composition and anaerobic fitness in overweight and obese children and adolescents
    Klaus Karner-Rezek
    Private University of the Principality of Liechtenstein, Triesen, Principality of Liechtenstein, Zurich, Switzerland
    Int J Gen Med 6:159-66. 2013
    ....
  34. pmc Sex differences in 24-hour ultra-marathon performance--a retrospective data analysis from 1977 to 2012
    Laura Peter
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland, University of Zurich, Institute of General Practice and Health Services Research, Zurich, Switzerland
    Clinics (Sao Paulo) 69:38-46. 2014
    ..This study examined the changes in running performance and the sex differences between women and men in 24-hour ultra-marathons held worldwide from 1977 to 2012...
  35. pmc Runners in their forties dominate ultra-marathons from 50 to 3,100 miles
    Matthias Alexander Zingg
    University of Zurich, Institute of General Practice and for Health Services Research, Zurich, Switzerland, University of Zurich, Institute of General Practice and for Health Services Research, Zurich, Switzerland
    Clinics (Sao Paulo) 69:203-11. 2014
    ..This study investigated performance trends and the age of peak running speed in ultra-marathons from 50 to 3,100 miles...
  36. pmc No damage of joint cartilage of the lower limbs in an ultra-endurance athlete--an MRI-study
    Matthias Alexander Zingg
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    BMC Musculoskelet Disord 14:343. 2013
    ..To date no case report exists where an ultra-endurance athlete was examined such detailed regarding overuse-injuries of his joints...
  37. pmc Does continuous endurance exercise in water elicit a higher release of ANP and BNP and a higher plasma concentration of FFAs in pre-obese and obese men than high intensity intermittent endurance exercise? - study protocol for a randomized controlled trial
    Klaus Karner-Rezek
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    Trials 14:328. 2013
    ..Exercise modalities may play a significant role in the future prevention and treatment of obesity...
  38. pmc The TransEurope FootRace Project: longitudinal data acquisition in a cluster randomized mobile MRI observational cohort study on 44 endurance runners at a 64-stage 4,486 km transcontinental ultramarathon
    Uwe H W Schütz
    Department of Diagnostic and Interventional Radiology, University Hospital of Ulm, Germany
    BMC Med 10:78. 2012
    ..A detailed description of the TEFR project and its implemented measuring methods in relation to the hypotheses are presented...
  39. pmc Graves' disease in monozygotic twins - a case report
    Christoph A Rüst
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    BMC Endocr Disord 13:17. 2013
    ..The rare situation of hyperthyroidism with Graves' disease in twins has been reported in a very few case reports in literature...
  40. ncbi request reprint The age-related decline in Olympic distance triathlon performance differs between males and females
    F Etter
    Institute of General Practice and for Health Services Research University of Zurich, Zurich, Switzerland
    J Sports Med Phys Fitness 53:261-7. 2013
    ..The aim of this cross-sectional study was to compare the age-related declines in swimming, cycling, and running and overall race times between males and females in an Olympic distance triathlon, the 'Zürich Triathlon' in Switzerland...
  41. doi request reprint A comparison of anthropometric and training characteristics between recreational female marathoners and recreational female Ironman triathletes
    Christoph Alexander Rüst
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    Chin J Physiol 56:1-10. 2013
    ..These findings suggest that recreational female Ironman triathletes are not comparable to recreational female marathoners regarding the association between anthropometric and training characteristics with race time...
  42. doi request reprint Regulation of electrolyte and fluid metabolism in multi-stage ultra-marathoners
    B Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Horm Metab Res 44:919-26. 2012
    ..Further studies are needed to determine the antidiuretic hormone (ADH) and both the atrial natriuretic peptide (ANP) and the brain natriuretic peptide (BNP) during multi-stage races...
  43. ncbi request reprint Estimation bias: body mass and body height in endurance athletes
    Beat Knechtle
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    Percept Mot Skills 115:833-44. 2012
    ..The differences between measured and estimated body mass, height, and BMI were within the range of normal daily variation, and for body height even within the precision of the measurement (0.5 cm)...
  44. pmc Ad libitum fluid intake leads to no leg swelling in male Ironman triathletes - an observational field study
    Michael Meyer
    Institute of Primary Care and Health Services Research, University of Zurich, Zurich, Switzerland
    J Int Soc Sports Nutr 9:40. 2012
    ..We investigated a potential development of peripheral oedemata in Ironman triathletes competing over 3.8 km swimming, 180 km cycling and 42.2 km running...
  45. ncbi request reprint Branched-chain amino acid supplementation during a 100-km ultra-marathon--a randomized controlled trial
    Beat Knechtle
    Facharzt FMH fur Allgemeinmedizin, Gesundheitszentrum St Gallen, St Gallen, Switzerland
    J Nutr Sci Vitaminol (Tokyo) 58:36-44. 2012
    ..We concluded that BCAA-supplementation before and during a 100-km ultra-marathon had no effect on performance, skeletal muscle damage or renal function...
  46. doi request reprint A faster running speed is associated with a greater body weight loss in 100-km ultra-marathoners
    Beat Knechtle
    Facharzt FMH fur Allgemeinmedizin, St Gallen, Switzerland
    J Sports Sci 30:1131-40. 2012
    ..05). In conclusion, faster runners lost more body mass, runners lost more body mass when they drank less fluid, and faster runners drank more fluid than slower runners...
  47. pmc Age-related changes in 100-km ultra-marathon running performance
    Beat Knechtle
    Facharzt FMH fur Allgemeinmedizin, Gesundheitszentrum St Gallen, Vadianstrasse 26, St Gallen, Switzerland
    Age (Dordr) 34:1033-45. 2012
    ..Future studies should investigate the lifespan from 65 to 75 years to better understand the performance difference between male and female master ultra-marathoners...
  48. pmc An increased fluid intake leads to feet swelling in 100-km ultra-marathoners - an observational field study
    Caroline Cejka
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    J Int Soc Sports Nutr 9:11. 2012
    ....
  49. pmc Nutritional behavior of cyclists during a 24-hour team relay race: a field study report
    Raul Bescos
    Institut Nacional d Educacio Fisica de Catalunya, Sports Sciences Research Group, Universitat de Barcelona, Spain
    J Int Soc Sports Nutr 9:3. 2012
    ..Additionally, we analyzed the relationship among the nutritional and performance variables...
  50. ncbi request reprint A comparison of ultra-endurance cyclists in a qualifying ultra-cycling race for Paris-Brest-Paris and Race Across America-Swiss cycling marathon
    Beat Knechtle
    Facharzt FMH fiür Allgemeinmedizin, Gesundheitszentrum St Gallen, Vadianstrasse 26, 9001 St Gallen, Switzerland
    Percept Mot Skills 114:96-110. 2012
    ..Future studies should evaluate personality and motivational differences in ultra-endurance events and between these athletes and athletes in other sports...
  51. ncbi request reprint Age, training, and previous experience predict race performance in long-distance inline skaters, not anthropometry
    Beat Knechtle
    Facharzt FMH fur Allgemeinmedizin, Gesundheitszentrum St Gallen, Vadianstrasse 26, 9001 St Gallen, Switzerland
    Percept Mot Skills 114:141-56. 2012
    ..This may be reflected in the preparation and training for the event. Future studies should investigate what motivates these athletes to train and compete...
  52. doi request reprint No improvement in race performance by naps in male ultra-endurance cyclists in a 600-km ultra-cycling race
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Chin J Physiol 55:125-33. 2012
    ..Athletes with naps were highly significantly slower than athletes without naps...
  53. doi request reprint A comparison of fat mass and skeletal muscle mass estimation in male ultra-endurance athletes using bioelectrical impedance analysis and different anthropometric methods
    B Knechtle
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    Nutr Hosp 26:1420-7. 2011
    ..and Janssen et al. (P < 0.001). To summarise, the determination of body composition in ultra-endurance athletes using BIA reported significantly high values of fat and skeletal muscle mass when compared with anthropometric equations...
  54. doi request reprint Effect of a multistage ultraendurance triathlon on aldosterone, vasopressin, extracellular water and urine electrolytes
    B Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Scott Med J 57:26-32. 2012
    ..In conclusion, ECW and aldosterone increased after this multistage ultraendurance triathlon, but vasopressin did not. The increase in ECW and the increase in aldosterone were not associated...
  55. doi request reprint Finishers and nonfinishers in the 'Swiss Cycling Marathon ' to qualify for the 'Race Across America '
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    J Strength Cond Res 25:3257-63. 2011
    ..The key to a successful finish in an ultraendurance cycling race such as the 'Swiss Cycling Marathon' seems a high speed in training and an appropriate nutrition during the race...
  56. ncbi request reprint Body mass and circumference of upper arm are associated with race performance in ultraendurance runners in a multistage race--the Isarrun 2006
    Beat Knechtle
    St Gallen Health Center, Vadianstrasse, Switzerland
    Res Q Exerc Sport 80:262-8. 2009
    ..In contrast, body height, skinfold thicknesses, circumferences of the other extremities, SM, and %BF showed no association with race performance...
  57. ncbi request reprint No change of body mass, fat mass, and skeletal muscle mass in ultraendurance swimmers after 12 hours of swimming
    Beat Knechtle
    St Gallen Health Center, St Gallen, Switzerland
    Res Q Exerc Sport 80:62-70. 2009
    ..05), but urine gravity decreased significantly (p < .001). Two participants showed increased signals of ketone bodies after the race. In these samples, the hydroxybutyrate-creatinine ratio increased more than tenfold...
  58. doi request reprint Skin-fold thickness and training volume in ultra-triathletes
    B Knechtle
    Gesundheitszentrum, St Gallen, St Gallen, Switzerland
    Int J Sports Med 30:343-7. 2009
    ..38, p<0.0001). We concluded that anthropometry was of more importance than training volume in male Triple Iron triathletes and that these athletes were close to runners regarding the relationship of anthropometry with race performance...
  59. doi request reprint An ultra-cycling race leads to no decrease in skeletal muscle mass
    B Knechtle
    Gesundheitszentrum, St Gallen, Switzerland
    Int J Sports Med 30:163-7. 2009
    ..05). Urea increased highly significantly (p<0.01); however Delta urea was not associated with Delta skeletal muscle mass. We concluded that ultra-cycling in contrast to ultra-running leads to no reduction in skeletal muscle mass...
  60. doi request reprint [Change of body composition in an 81 year old runner in a 100 km run]
    B Knechtle
    Gesundheitszentrum St Gallen und Institut für Hausarztmedizin, Universitatsspital Zurich
    Praxis (Bern 1994) 98:143-9. 2009
    ..In future studies, additional methods should be performed to provide information whether skeletal muscle mass decreased after endurance performance and whether metabolites of skeletal muscle mass degradation may impair renal function...
  61. doi request reprint Body composition, energy, and fluid turnover in a five-day multistage ultratriathlon: a case study
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Res Sports Med 17:104-20. 2009
    ..The increase of PV and TBW could be a result of an increase of sodium, which was increased after every stage. We presume that this could be the result of an increased activity of aldosterone...
  62. doi request reprint No dehydration in mountain bike ultra-marathoners
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Clin J Sport Med 19:415-20. 2009
    ..To assess the change in body composition and hydration status in cyclists in a mountain bike ultra-marathon...
  63. ncbi request reprint Personal best time, percent body fat, and training are differently associated with race time for male and female ironman triathletes
    Beat Knechtle
    St Gallen Health Center, St Gallen, Switzerland
    Res Q Exerc Sport 81:62-8. 2010
    ..Personal best time in an Ironman triathlon was associated with total race time for both male and female athletes...
  64. doi request reprint Swimming in ice cold water
    B Knechtle
    Gesundheitszentrum St Gallen, Switzerland
    Ir J Med Sci 178:507-11. 2009
    ..We investigated two athletes swimming in 4°C for 23 min (1.3 km, swimmer 1) and 42 min (2.2 km, swimmer 2), respectively...
  65. ncbi request reprint Moderate association of anthropometry, but not training volume, with race performance in male ultraendurance cyclists
    Beat Knechtle
    St Gallen Health Center, St Gallen, Switzerland
    Res Q Exerc Sport 80:563-8. 2009
    ..178, p < .05), whereas training volume showed no association (r2 = .000, p > .05). We concluded that anthropometry had a greater influence on race performance than training volume in recreational ultraendurance cyclists...
  66. ncbi request reprint Increase of total body water with decrease of body mass while running 100 km nonstop--formation of edema?
    Beat Knechtle
    St Gallen Health Center, St Gallen, Switzerland
    Res Q Exerc Sport 80:593-603. 2009
    ..The change of body mass was associated with the change of total body water (p < .05), and we presume the development of...
  67. ncbi request reprint Anthropometry and pre-race experience of finishers and nonfinishers in a multistage ultra-endurance run--Deutschlandlauf 2007
    Beat Knechtle
    Institute of General Practice and Health Services Research University of Zurich Gesundheitszentrum St Gallen, Switzerland
    Percept Mot Skills 109:105-18. 2009
    ..In future studies of ultra-runners, the influence of psychological (cognitive and emotional) predictors on race outcome should be investigated...
  68. doi request reprint Training volume and personal best time in marathon, not anthropometric parameters, are associated with performance in male 100-km ultrarunners
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    J Strength Cond Res 24:604-9. 2010
    ..05). We conclude that high training volume and a fast time in a marathon were more important for a fast race time in male 100-km runners than any of the determined anthropometric variables...
  69. ncbi request reprint Maintained total body water content and serum sodium concentrations despite body mass loss in female ultra-runners drinking ad libitum during a 100 km race
    Beat Knechtle
    Facharzt FMH fur Allgemeinmedizin, Gesundheitszentrum St Gallen, Vadianstrasse 26, 9001 St Gallen, Switzerland
    Asia Pac J Clin Nutr 19:83-90. 2010
    ..The reported higher incidence of exercise-associated hyponatremia in women is not really a gender effect but due to women being more prone to overdrink...
  70. ncbi request reprint Male ironman triathletes lose skeletal muscle mass
    Beat Knechtle
    Facharzt FMH fur Allgemeinmedizin, Gesundheitszentrum St Gallen, Vadianstrasse 26, 9001 St Gallen, Switzerland
    Asia Pac J Clin Nutr 19:91-7. 2010
    ..05). We concluded that male triathletes in an Ironman triathlon lose 1.8 kg of body mass and 1 kg of skeletal muscle mass, presumably due to a depletion of intramyocellular stored glycogen and lipids...
  71. doi request reprint The effects of running 1,200 km within 17 days on body composition in a female ultrarunner-Deutschlandlauf 2007
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Res Sports Med 16:167-88. 2008
    ..This type of analysis provides a unique opportunity to gain insight into the physiological changes during multiday running in ultraendurance athletes...
  72. ncbi request reprint [The effect of a multi-stage ultra-endurance triathlon over ten times an iron-man-triathlon on fat mass and skeletal muscle mass--the world challenge deca iron 2006]
    B Knechtle
    Gesundheitszentrum St Gallen
    Praxis (Bern 1994) 97:885-92. 2008
    ..Body mass did not change (p > 0.05), whereas skeletal muscle mass statistically significantly decreased by 1.1 kg (p < 0.05) and fat mass significantly decreased by 0.9 kg (p < 0.05)...
  73. ncbi request reprint Upper arm circumference is associated with race performance in ultra-endurance runners
    B Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Br J Sports Med 42:295-9; discussion 299. 2008
    ..To investigate the association of anthropometric parameters to race performance in ultra-endurance runners in a multistage ultra-endurance run...
  74. ncbi request reprint Effect of a multistage ultra-endurance triathlon on body composition: World Challenge Deca Iron Triathlon 2006
    B Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Br J Sports Med 42:121-5; discussion 125. 2008
    ..To investigate the effect of a multistage ultra-endurance triathlon on body composition in ultra-triathletes...
  75. ncbi request reprint [A 12 hour indoor cycling marathon leads to a measurable decrease of adipose subcutaneous tissue]
    B Knechtle
    Gesundheitszentrum St Gallen
    Praxis (Bern 1994) 96:1071-7. 2007
    ..In order to confirm results obtained in a case study, a larger number of athletes would have to be analyzed. A possible oedema would have to be objectified by a bioelectrical impedance analysis...
  76. ncbi request reprint [Running helps--or how you escape depression without a psychiatrist and end up running a marathon!]
    B Knechtle
    Gesundheitszentrum St Gallen, St Gallen
    Praxis (Bern 1994) 96:1351-6. 2007
    ..Thanks to progressively increasing running training, the patient was able to run a half-marathon in her first training year and aims for marathon and Powerman-Duathlon in the future...
  77. ncbi request reprint [12 hours running results in a decrease of the subcutaneous adipose tissue]
    B Knechtle
    Facharzt FMH fur Allgemeinmedizin, Gesundheitszentrum St Gallen
    Praxis (Bern 1994) 96:1423-9. 2007
    ..The difference between determining fat mass with the skin fold method or with the bioelectrical impedance analysis is discussed...
  78. ncbi request reprint Decrease in body fat during an ultra-endurance triathlon is associated with race intensity
    B Knechtle
    Gesundheitszentrum St Gallen, Vadianstr 26, St Gallen 9001, Switzerland
    Br J Sports Med 42:609-13. 2008
    ..To investigate whether adipose subcutaneous tissue or skeletal muscle mass decreased during a non-stop ultra-endurance triathlon...
  79. ncbi request reprint [Swimming for 12 hours leads to no reduction of adipose subcutaneous tissue--a case study]
    B Knechtle
    Gesundheitszentrum St Gallen
    Praxis (Bern 1994) 96:1805-10. 2007
    ..In order to confirm these results obtained in a case study regarding the decrease of skeletal muscle mass with stable fat mass during prolonged swimming exercise, a larger number of athletes would have to be analyzed...
  80. ncbi request reprint Cycling and running performance, not anthropometric factors, are associated with race performance in a Triple Iron Triathlon
    B Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Res Sports Med 15:257-69. 2007
    ..Total race performance is associated with performance in cycling and running, not in swimming...
  81. doi request reprint Personal best marathon performance is associated with performance in a 24-h run and not anthropometry or training volume
    B Knechtle
    Facharzt FMH fur Allgemeinmedizin, Gesundheitszentrum, Vadianstrasse 26, CH 9001 St Gallen, Switzerland
    Br J Sports Med 43:836-9. 2009
    ..In this study, the influence of anthropometric and training parameters on race performance in ultra-endurance runners in a 24-h run was investigated...
  82. ncbi request reprint Effects of a Deca Iron Triathlon on body composition: a case study
    B Knechtle
    St Gallen, Gesundheitszentrum, St Gallen, Switzerland
    Int J Sports Med 29:343-51. 2008
    ..We presume that energy deficit was covered by consumption of adipose subcutaneous tissue as well as skeletal muscle mass; the degradation of muscle mass seems to lead to hypoproteinemic edemas...
  83. ncbi request reprint [Nutritional behaviours in ultra-endurance runners--Deutschlandlauf 2006]
    B Knechtle
    Gesundheitszentrum St Gallen
    Praxis (Bern 1994) 97:243-51. 2008
    ....