Beat Knechtle

Summary

Affiliation: St Gallen
Country: Switzerland

Publications

  1. doi request reprint Personal best time, not anthropometry or training volume, is associated with total race time in a triple iron triathlon
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    J Strength Cond Res 25:1142-50. 2011
  2. ncbi request reprint Predictors of race time in male ironman triathletes: physical characteristics, training, or prerace experience?
    Beat Knechtle
    Gesundheitszentrum St Gallen, Vadianstrasse 26, 9001 St Gallen, Switzerland
    Percept Mot Skills 111:437-46. 2010
  3. doi request reprint 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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

Collaborators

  • Thomas Rosemann
  • Romuald Lepers
  • Oliver Senn
  • Gotz Kohler
  • A Wirth
  • Reinhard Imoberdorf
  • Marco Toigo
  • Michael Meyer
  • R Kaul
  • Raul Bescos
  • Christoph Alexander Rüst
  • Patrizia Knechtle
  • F Etter
  • Matthias Alexander Zingg
  • Christoph A Rüst
  • Klaus Karner-Rezek
  • Alexia Bracher
  • Caroline Cejka
  • Uwe H W Schütz
  • Lutz Herbst
  • Joeri Gredig
  • Fabian Morsbach
  • Shila Pazahr
  • Matthias Fenzl
  • Andreas Gutzeit
  • Peter Matthias Mundinger
  • Walter Wiesner
  • C A Rüst
  • Bruno Lutz
  • Stefan Gröninger
  • Markus Gnädinger
  • Jürgen Machann
  • Arno Schmidt-Trucksäss
  • Heike Wiedelbach
  • Jolanda Bürge
  • Christian Billich
  • Ingo Schulze
  • Wolfgang Freund
  • Hans Jürgen Brambs
  • Horst Brunner
  • Martin Ehrhardt
  • Carlos Luis Lopez
  • Jorge Luis Andonie
  • Oscar Salas Fraire

Detail Information

Publications86

  1. doi request reprint Personal best time, not anthropometry or training volume, is associated with total race time in a triple iron triathlon
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    J Strength Cond Res 25:1142-50. 2011
    ..However, ultrarunners should also have enough prerace experience in competing in Ironman and Triple Iron triathlons to successfully finish such a race...
  2. ncbi request reprint Predictors of race time in male ironman triathletes: physical characteristics, training, or prerace experience?
    Beat Knechtle
    Gesundheitszentrum St Gallen, Vadianstrasse 26, 9001 St Gallen, Switzerland
    Percept Mot Skills 111:437-46. 2010
    ..Faster running while training and both a fast personal best time in a marathon and in an Olympic distance triathlon were associated with a fast Ironman race time...
  3. doi request reprint 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...
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. 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...
  9. 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...
  10. 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)...
  11. 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
    ..abstract:..
  12. 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...
  13. 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...
  14. 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...
  15. 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
    ..abstract:..
  16. 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
    ..abstract:..
  17. 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...
  18. 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...
  19. 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...
  20. 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...
  21. 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...
  22. 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...
  23. doi request reprint What is associated with race performance in male 100-km ultra-marathoners--anthropometry, training or marathon best time?
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    J Sports Sci 29:571-7. 2011
    ..We conclude that both training and anthropometry were independently associated with race performance. These characteristics remained relevant even when controlling for personal best time in a marathon...
  24. ncbi request reprint Similarity of anthropometric measures for male ultra-triathletes and ultra-runners
    Beat Knechtle
    Gesundheitszentrum St Gallen, Switzerland
    Percept Mot Skills 111:805-18. 2010
    ..55, .40, -.28, and -.51, respectively). Overall, the ultra-triathletes were not similar to ultra-runners in their anthropometric measures and training variables...
  25. ncbi request reprint Predictor variables for a 100-km race time in male ultra-marathoners
    Beat Knechtle
    Gesundheitszentrum St Gallen, Switzerland
    Percept Mot Skills 111:681-93. 2010
    ..Motivation to train intensely for such an ultra-endurance run should be explored as this might be the key for a successful finish...
  26. ncbi request reprint Sex differences in association of race performance, skin-fold thicknesses, and training variables for recreational half-marathon runners
    Beat Knechtle
    Institute of General Practice and Health Services Research University of Zurich
    Percept Mot Skills 111:653-68. 2010
    ..Skin-fold thicknesses and training variables in these groups were differently related to race time according to their sex...
  27. doi request reprint No fluid overload in male ultra-runners during a 100 km ultra-run
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Res Sports Med 19:14-27. 2011
    ....
  28. ncbi request reprint Speed during training and anthropometric measures in relation to race performance by male and female open-water ultra-endurance swimmers
    Beat Knechtle
    Gesundheitszentrum St Gallen, Switzerland
    Percept Mot Skills 111:463-74. 2010
    ..For the women, swimming speed during training was associated with performance in the bivariate analysis. In the multivariate analysis for the men, Body Mass Index and swimming speed during training were related to race time...
  29. doi request reprint No exercise-associated hyponatremia found in an observational field study of male ultra-marathoners participating in a 24-hour ultra-run
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Phys Sportsmed 38:94-100. 2010
    ..Instead, the correct definition should be a plasma sodium concentration of 130 mmol/L (ie, 5 mmol/L below the normal resting value). Following this definition, it was determined that no athlete developed EAH in this 24-hour run...
  30. doi request reprint Upper body skinfold thickness is related to race performance in male Ironman triathletes
    B Knechtle
    Gesundheitszentrum, St Gallen, Switzerland
    Int J Sports Med 32:20-7. 2011
    ..The results of this study indicate that low skinfold thicknesses of the upper body are related to race performance in male Ironman triathletes, but not in females...
  31. doi request reprint Prevalence of exercise-associated hyponatremia in male ultraendurance athletes
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    Clin J Sport Med 21:226-32. 2011
    ..The aim of this study was to investigate the prevalence of EAH in male ultraendurance athletes in other disciplines, such as ultraswimming, ultracycling, and ultramarathon running...
  32. pmc No effect of short-term amino acid supplementation on variables related to skeletal muscle damage in 100 km ultra-runners - a randomized controlled trial
    Beat Knechtle
    Gesundheitszentrum St, Gallen, St, Gallen, Switzerland
    J Int Soc Sports Nutr 8:6. 2011
    ..abstract:..
  33. doi request reprint No case of exercise-associated hyponatremia in male ultra-endurance mountain bikers in the 'Swiss Bike Masters'
    Beat Knechtle
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    Chin J Physiol 54:379-84. 2011
    ..40, P < 0.01). Ad libitum fluid intake showed no case of EAH in a single-stage mountain bike ultra-marathon. In contrast to previous findings, the faster athletes drank more than the slower ones...
  34. 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...
  35. doi request reprint A comparison of anthropometric and training characteristics of Ironman triathletes and Triple Iron ultra-triathletes
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    J Sports Sci 29:1373-80. 2011
    ..Triple Iron ultra-triathletes relied more on training volume in cycling and running, whereas speed in cycling training was related to race time in Ironman triathletes...
  36. doi request reprint The effect of 1,000 km nonstop cycling on fat mass and skeletal muscle mass
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Res Sports Med 19:170-85. 2011
    ....
  37. doi request reprint Anthropometric and training variables related to half-marathon running performance in recreational female runners
    Beat Knechtle
    Facharzt FMH fur Allgemeinmedizin, Gesundheitszentrum St Gallen, Switzerland
    Phys Sportsmed 39:158-66. 2011
    ..For practical applications, high running speed during training (as opposed to extensive training) may both reduce upper-body skin-fold thicknesses and improve race performance in recreational female half-marathon runners...
  38. doi request reprint Personal best marathon time and longest training run, not anthropometry, predict performance in recreational 24-hour ultrarunners
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    J Strength Cond Res 25:2212-8. 2011
    ....
  39. doi request reprint Predictor variables of performance in recreational male long-distance inline skaters
    Beat Knechtle
    Gesundheitszentrum, St Gallen, Switzerland
    J Sports Sci 29:959-66. 2011
    ..41): Race time (min) = 114.91 + 0:51* (duration per training unit, min) + 0:85* (age, years) +3:78* (body fat, %) for recreational long-distance inline skaters...
  40. doi request reprint Personal best time and training volume, not anthropometry, is related to race performance in the 'Swiss Bike Masters' mountain bike ultramarathon
    Beat Knechtle
    Health Center St Gallen, St Gallen, Switzerland
    J Strength Cond Res 25:1312-7. 2011
    ....
  41. pmc Predictor variables for half marathon race time in recreational female runners
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Clinics (Sao Paulo) 66:287-91. 2011
    ..The relationship between skin-fold thickness and running performance has been investigated from 100 m to the marathon distance, except the half marathon distance...
  42. doi request reprint Low prevalence of exercise-associated hyponatremia in male 100 km ultra-marathon runners in Switzerland
    Beat Knechtle
    Facharzt FMH fur Allgemeinmedizin, Gesundheitszentrum St Gallen, Vadianstrasse 26, 9001 St Gallen, Switzerland
    Eur J Appl Physiol 111:1007-16. 2011
    ..To conclude, the prevalence of EAH was low at ~5% in these male 100 km ultra-marathoners. EAH was asymptomatic and would not have been detected without the measurement of plasma [Na(+)]...
  43. pmc Influence of anthropometry on race performance in extreme endurance triathletes: World Challenge Deca Iron Triathlon 2006
    Beat Knechtle
    Gesundheitszentrum St Gallen, Switzerland
    Br J Sports Med 41:644-8; discussion 648. 2007
    ..To investigate the influence of anthropometric variables on race performance in ultra-endurance triathletes in an ultra-triathlon...
  44. doi request reprint An ultratriathlon leads to a decrease of body fat and skeletal muscle mass--the Triple Iron Triathlon Austria 2006
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Res Sports Med 16:97-110. 2008
    ..06). There is no association between total race time and the loss of BM (r(2) = 0.06), %BF (r(2) = 0.10), and SM (r2 = 0.11). No significant correlation (p > 0.05, r(2)= 0.43) was found between the initial SM and loss of SM...
  45. ncbi request reprint Vitamins, minerals and race performance in ultra-endurance runners--Deutschlandlauf 2006
    Beat Knechtle
    Gesundheitszentrum, Vadianstrasse 26, 9001 St Gallen, Switzerland
    Asia Pac J Clin Nutr 17:194-8. 2008
    ....
  46. 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)...
  47. 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...
  48. 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...
  49. 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...
  50. 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...
  51. 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...
  52. ncbi request reprint [Nutritional behaviours in ultra-endurance runners--Deutschlandlauf 2006]
    B Knechtle
    Gesundheitszentrum St Gallen
    Praxis (Bern 1994) 97:243-51. 2008
    ....
  53. ncbi request reprint No correlation of anthropometry and race performance in ultra-endurance swimmers at a 12-hours-swim
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Anthropol Anz 66:73-9. 2008
    ....
  54. 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...
  55. 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...
  56. 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...
  57. 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...
  58. 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...
  59. 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...
  60. 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...
  61. 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...
  62. 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...
  63. 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...
  64. ncbi request reprint Intra- and inter-judge reliabilities in measuring the skin-fold thicknesses of ultra runners under field conditions
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Percept Mot Skills 111:105-6. 2010
    ..Inter- and intra-judge reliabilities of skinfold measures were investigated in a sample of 27 men and 11 women ultramarathon runners. Two physicians had agreement higher than 90% in field measurements before an ultramarathon race...
  65. 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...
  66. 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...
  67. 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...
  68. doi request reprint An ironman triathlon does not lead to a change in body mass in female triathletes
    Beat Knechtle
    Facharzt FMH fur Allgemeinmedizin, Gesundheitszentrum St Gallen, Vadianstrasse 26, 9001 St Gallen, Switzerland
    Res Sports Med 18:115-26. 2010
    ..The statistically insignificant loss of 0.6 kg in body mass was smaller than reported in studies of male athletes...
  69. doi request reprint Do ultra-runners in a 24-h run really dehydrate?
    B Knechtle
    Gesundheitszentrum St Gallen, Vadianstrasse 26, 9001, St Gallen, Switzerland
    Ir J Med Sci 180:129-34. 2011
    ..Loss of body mass during a 24-h run was considered to be a result of dehydration...
  70. doi request reprint Differential correlations between anthropometry, training volume, and performance in male and female Ironman triathletes
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    J Strength Cond Res 24:2785-93. 2010
    ..Presumably, the relationship between percent body fat, training volume, and race performance is genetically determined...
  71. ncbi request reprint Race performance in male mountain ultra-marathoners: anthropometry or training?
    Beat Knechtle
    Facharzt FMH fur Allgemeinmedizin, Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Percept Mot Skills 110:721-35. 2010
    ....
  72. ncbi request reprint ATriple Iron triathlon leads to a decrease in total body mass but not to dehydration
    Beat Knechtle
    St Gallen Health Center, St Gallen, Switzerland
    Res Q Exerc Sport 81:319-27. 2010
    ..The association of decrease in skeletal muscle mass and increased plasma urea suggests a loss in skeletal muscle mass...
  73. 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...
  74. 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...
  75. 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...
  76. 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...
  77. 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...
  78. 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...
  79. 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...
  80. doi request reprint Participation and performance trends in ultra-triathlons from 1985 to 2009
    B Knechtle
    Facharzt FMH fur Allgemeinmedizin, Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Scand J Med Sci Sports 21:e82-90. 2011
    ..Further investigations are required to understand why this gender difference in total performance time increased with the distance in ultra-triathlons...
  81. ncbi request reprint Do male 100-km ultra-marathoners overdrink?
    Beat Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Int J Sports Physiol Perform 6:195-207. 2011
    ..Fluid overload is considered a main risk factor for exercise-associated hyponatremia (EAH). The aim of this study was to investigate the incidence of EAH in ultra-runners at the 100 km ultra-run in Biel, Switzerland...
  82. doi request reprint Fluid intake and changes in limb volumes in male ultra-marathoners: does fluid overload lead to peripheral oedema?
    Alexia Bracher
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    Eur J Appl Physiol 112:991-1003. 2012
    ..To conclude, fluid intake was related to the changes in limb volumes, where athletes with an increased fluid intake developed an increase in limb volumes...
  83. doi request reprint Pacing Strategy and Change in Body Composition during a Deca Iron Triathlon
    Lutz Herbst
    Institute of General Practice and Health Services Research, University of Zurich, Zurich, Switzerland
    Chin J Physiol 54:255-63. 2011
    ..To conclude, athletes need to have a high number of previously completed Triple Iron triathlons, as well as a fast personal best time in a Triple Iron triathlon, in order to finish a Deca Iron triathlon successfully...
  84. ncbi request reprint Running performance, not anthropometric factors, is associated with race success in a Triple Iron Triathlon
    B Knechtle
    Gesundheitszentrum St Gallen, St Gallen, Switzerland
    Br J Sports Med 43:437-41. 2009
    ..To investigate the influence of anthropometric parameters on race performance in ultra-endurance triathletes...
  85. pmc Atrophy of the brachialis muscle after a displaced clavicle fracture in an Ironman triathlete: case report
    Christoph Alexander Rüst
    Institute of General Practice and Health Services Research, University of Zurich, Pestalozzistrasse 24, CH 8091 Zurich, Switzerland
    J Brachial Plex Peripher Nerve Inj 6:7. 2011
    ..The atrophy occurred following a displaced midshaft clavicle fracture acquiring while falling off his bike after hitting a duck during a competition...
  86. doi request reprint No case of exercise-associated hyponatraemia in top male ultra-endurance cyclists: the 'Swiss Cycling Marathon'
    Christoph Alexander Rüst
    Institute of General Practice and for Health Services Research, University of Zurich, Zurich, Switzerland
    Eur J Appl Physiol 112:689-97. 2012
    ..Future studies regarding drinking behaviour in different ultra-endurance disciplines might give insights into why the prevalence of EAH is different in the different disciplines...