Research Topics
Species | J W CastellaniSummaryAffiliation: Walter Reed Army Medical Center Country: USA Publications
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Publications
Cold strain index applied to exercising men in cold-wet conditionsJ W Castellani
United States Army Research Institute of Environmental Medicine, Natick, MA 01760 5007, USA
Am J Physiol Regul Integr Comp Physiol 281:R1764-8. 2001....
Cold exposure: human immune responses and intracellular cytokine expressionJohn W Castellani
USARIEM, Thermal and Mountain Medicine Division, 42 Kansas Street, Natick, MA 01760 5007, USA
Med Sci Sports Exerc 34:2013-20. 2002..Based on the review of the literature, there is no support for the concept that cold exposure depresses immune function...
Symposium: Immune function in environmental extremes--an introductionJohn W Castellani
USARIEM, Thermal and Mountain Medicine Division, Natick, MA 01760-5007, USA
Med Sci Sports Exerc 34:2002-3. 2002
Body fluid regulation in a simulated disabled submarine: effects of cold, reduced O2, and elevated CO2John W Castellani
Thermal and Mountain Medicine Division, U S Army Research Institute of Environmental Medicine, 42 Kansas St, Natick, MA 01760 5007, USA
Aviat Space Environ Med 76:753-9. 2005..We hypothesized that elevated CO2 levels would lead to hormone changes that would mitigate cold and hypoxia-induced body fluid losses...
Pituitary-adrenal and pituitary-thyroid hormone responses during exercise-cold exposure after 7 days of exhaustive exerciseJohn W Castellani
US Army Research Institute of Environmental Medicine, Thermal and Mountain Medicine Division, Natick, MA 01760 5007, USA
Aviat Space Environ Med 73:544-50. 2002..The effects of exertional fatigue on pituitary-adrenal hormones and thyroid hormone responses to exercise-cold stress are unknown...
Cortisol and testosterone concentrations in wheelchair athletes during submaximal wheelchair ergometryJ W Castellani
US Army Research Institute of Environmental Medicine, 42 Kansas Street, Natick, MA 01760 5007, USA
Eur J Appl Physiol 84:42-7. 2001..The greater exercise response in WA for plasma testosterone should be confirmed on a larger population. It could have been the result of the lower plasma testosterone concentrations at rest in our group...
Thermoregulation during cold exposure after several days of exhaustive exerciseJ W Castellani
Thermal and Mountain Medicine Division, United States Army Research Institute of Environmental Medicine, Natick, Massachusetts 01760 5007, USA
J Appl Physiol 90:939-46. 2001..These findings suggest that susceptibility to hypothermia is increased by exertional fatigue...
Thermoregulation during cold exposure: effects of prior exerciseJ W Castellani
Thermal and Mountain Medicine Division, US Army Research Institute of Environmental Medicine, Natick, Massachusetts 01760 5007, USA
J Appl Physiol 87:247-52. 1999..The combination of exercise intensity and duration studied in these experiments did not fatigue the shivering response to cold exposure...
Thermoregulatory responses to cold water at different times of dayJ W Castellani
Thermal and Mountain Medicine Division, US Army Research Institute of Environmental Medicine, Natick, Massachusetts 01760 5007, USA
J Appl Physiol 87:243-6. 1999..These data indicate that shivering and vasoconstriction are not affected by time of day. These observations raise the possibility that CWI may increase the risk of hypothermia in the early morning because of a lower initial T(core)...
Eighty-four hours of sustained operations alter thermoregulation during cold exposureJohn W Castellani
US Army Research Institute of Environmental Medicine Natick, MA 01760 5007, USA
Med Sci Sports Exerc 35:175-81. 2003..PURPOSE; This study examined the effects of short-term (3.5 d) sustained military operations (SUSOPS) on thermoregulatory responses to cold stress...
Exertional fatigue, sleep loss, and negative energy balance increase susceptibility to hypothermiaA J Young
United States Army Research Institute of Environmental Medicine, Natick, Massachusetts 01760, USA
J Appl Physiol 85:1210-7. 1998..A short period of rest, sleep, and refeeding restored the thermogenic response to cold, but thermal balance in the cold remained compromised until after several weeks of recovery when tissue insulation had been restored...
Physiological responses to cold exposure in men: a disabled submarine studyJ W Castellani
US Army Research Institute of Environmental Medicine, Natick, MA 01760-5007, USA
Undersea Hyperb Med 29:189-203. 2002..These thermoregulatory effector changes do not increase the risk for hypothermia in DISSUB survivors who are adequately clothed...
Human thermoregulatory responses during serial cold-water immersionsJ W Castellani
Thermal and Mountain Medicine Division, US Army Research Institute of Environmental Medicine, Natick, Massachusetts 01760 5007, USA
J Appl Physiol 85:204-9. 1998..An alternative explanation is that shivering habituation develops rapidly during serially repeated cold exposures...
Rehydration with fluid of varying tonicities: effects on fluid regulatory hormones and exercise performance in the heatR W Kenefick
US Army Research Institute of Environmental Medicine, Thermal and Mountain Medicine Division, Natick, MA 01760, USA
J Appl Physiol 102:1899-905. 2007..Neither a fluid of greater tonicity nor the route of administration resulted in a more rapid or greater fluid retention, nor did it enhance heat tolerance or diminish physiological strain during subsequent exercise in the heat...
Telemetry pill measurement of core temperature in humans during active heating and coolingC O'BRIEN
U S Army Research Institute of Environmental Medicine, Natick, MA 01760, USA
Med Sci Sports Exerc 30:468-72. 1998....
Effect of increased plasma osmolality on cold-induced thirst attenuationRobert William Kenefick
Thermal and Mountain Medicine Division, US Army Research Institute of Environmental Medicine, Kansas Street, Natick, MA, 01760, USA
Eur J Appl Physiol 104:1013-9. 2008..Thirst ratings remained elevated (P < 0.05) in the DH + NaCl treatment 30 min after dosing and 45 min at 4 degrees C versus DH + P and EU + P. Attenuation of thirst when dehydrated in the cold can be over-ridden by increasing P (osm)...
Exertion-induced fatigue and thermoregulation in the coldA J Young
Thermal and Mountain Medicine Division, US Army Research Institute of Environmental Medicine, Natick, MA 01760 5007, USA
Comp Biochem Physiol A Mol Integr Physiol 128:769-76. 2001....
Epidemiology of U.S. Army cold weather injuries, 1980-1999David W DeGroot
U S Army Research Institute of Environmental Medicine, Thermal and Mountain Medicine Division, Natick, MA 01760 5007, USA
Aviat Space Environ Med 74:564-70. 2003..The purpose of this cross-sectional study was to determine the occurrence of CWI hospitalizations in the U.S. Army from 1980 to 1999, and to identify possible trends, high-risk groups and/or activities...
Rapid IV versus oral rehydration: responses to subsequent exercise heat stressRobert W Kenefick
U S Army Research Institute of Environmental Medicine, Natick, MA 01760, USA
Med Sci Sports Exerc 38:2125-31. 2006..This study sought to determine the effect of rapid intravenous (IV) versus oral (ORAL) rehydration immediately after dehydration, on cardiovascular, thermoregulatory, and perceptual responses during subsequent exercise in the heat...
Thermal responses for men with different fat compositions during immersion in cold water at two depths: prediction versus observationXiaojiang Xu
Biophysics and Biomedical Modeling Division, US Army Research Institute of Environmental Medicine, Kansas St, Natick, MA, 01760, USA
Eur J Appl Physiol 100:79-88. 2007..CTM predicts Tc responses to immersion at various depths with acceptable accuracy for NF individuals in this study and can be adapted to non-uniform environments...
How hot is the human body?Michael N Sawka
J Appl Physiol 103:419-20. 2007
Cognitive, psychomotor, and physical performance in cold air after cooling by exercise in cold waterCatherine O'Brien
Thermal and Mountain Medicine Division, U S Army Research Institute of Environmental Medicine, Kansas Street, Building 42, Natick, MA 01760 5007, USA
Aviat Space Environ Med 78:568-73. 2007..This study evaluated performance after lowering core temperature at different rates while local tissues were either cooled (lower body) or not cooled (upper body)...
Exertional fatigue and cold exposure: mechanisms of hiker's hypothermiaAndrew J Young
US Army Research Institute of Environmental Medicine, Kansas St, Natick, MA 01760 5007, USA
Appl Physiol Nutr Metab 32:793-8. 2007..The mechanisms accounting for this thermoregulatory impairment are not clear, but the possibility that changes in blood glucose availability or sympathetic responsiveness to cold due to exertion and fatigue merit further research...
Evaluation of two cold thermoregulatory models for prediction of core temperature during exercise in cold waterJohn W Castellani
Thermal and Mountain Medicine Division, US Army Research Institute of Environmental Medicine, Natick, MA 01760 5007, USA
J Appl Physiol 103:2034-41. 2007..Algorithms need to be developed to better predict heat loss during exercise in cold water...
Hydration effects on cognitive performance during military tasks in temperate and cold environmentsGina E Adam
U S Army Research Institute of Environmental Medicine, Natick, MA 01760, USA
Physiol Behav 93:748-56. 2008..Moderate HYP had no effect on cognitive and psychomotor performance in either environment, cold exposure produced equivocal effects, and aerobic exercise improved some aspects of military task performance...
American College of Sports Medicine position stand: prevention of cold injuries during exerciseJohn W Castellani
Med Sci Sports Exerc 38:2012-29. 2006....
Dietary tyrosine benefits cognitive and psychomotor performance during body coolingCaroline Mahoney
Thermal and Mountain Medicine Division, U S Army Research Institute of Environmental Medicine, Natick, MA 01760, USA
Physiol Behav 90:301-7. 2007....
Cognition during sustained operations: comparison of a laboratory simulation to field studiesHarris R Lieberman
U S Army Research Institute of Environmental Medicine, Natick 01760 5007, USA
Aviat Space Environ Med 77:929-35. 2006..Our laboratory developed a brief, intense, laboratory-based simulation of a multistressor environment which included sleep loss, continuous physical activity, and food deprivation...
Differential responses of IGF-I molecular complexes to military operational field trainingBradley C Nindl
Military Performance Division, United States Army Research Institute of Environmental Medicine, Natick, MA 01760, USA
J Appl Physiol 95:1083-9. 2003..the relative proportion of IGF-I sequestered in ternary vs. nonternary molecular complexes appears to be well maintained...
Reliability assessment of two militarily relevant occupational physical performance testsClay E Pandorf
Military Performance Division, U.S. Army Research Institute of Environmental Medicine, Natick, MA, USA
Can J Appl Physiol 28:27-37. 2003..This study demonstrates that both are reliable tests, but they do require administration of 1 single-trial session of RBLT and 2 two-trial sessions of OC before highly reliable performance data are obtained...
Thirst sensations and AVP responses at rest and during exercise-cold exposureRobert W Kenefick
Department of Kinesiology, The University of New Hampshire, Durham, NH 03824, USA
Med Sci Sports Exerc 36:1528-34. 2004..The purpose of this study was to 1) determine the effect of hypohydration (HYPO) on thirst sensations during moderate exercise in the cold and 2) determine a possible mechanism for a cold-induced decline in thirst...
Reliability assessment of ballistic jump squats and bench throwsJoseph A Alemany
Military Performance Division, U.S. Army Research Institute of Environmental Medicine, Natick, MA 01760, USA
J Strength Cond Res 19:33-8. 2005..Slightly greater variability for JS was observed, although the test had high reliability...
Hypohydration impairs endurance exercise performance in temperate but not cold airSamuel N Cheuvront
US Army Research Institute of Environmental Medicine, Thermal and Mountain Medicine Division, Kansas St, Natick, MA 01760 5007, USA
J Appl Physiol 99:1972-6. 2005..05). These data demonstrate that 1) HYP impairs endurance exercise performance in temperate but not cold air but 2) cold stress per se does not...
Physical performance responses during 72 h of military operational stressBradley C Nindl
Military Performance Division, U S Army Research Institute of Environmental Medicine, Natick, MA 01760, USA
Med Sci Sports Exerc 34:1814-22. 2002..To characterize the impact of prolonged work, underfeeding, and sleep deprivation (i.e., sustained operations; SUSOPS) on physical and occupational related performance during military operational stress...
Altered secretion of growth hormone and luteinizing hormone after 84 h of sustained physical exertion superimposed on caloric and sleep restrictionBradley C Nindl
Military Performance Division, United States Army Research Institute of Environmental Medicine, Natick, Massachusetts 01760, USA
J Appl Physiol 100:120-8. 2006..During periods of energy deficiency, amplitude modulation of GH and LH pulses may precede alterations in pulse numbers...
Energy expenditure in men and women during 54 h of exercise and caloric deprivationJohn W Castellani
US Army Research Institute of Environmental Medicine, Natick, MA 01760, USA
Med Sci Sports Exerc 38:894-900. 2006..Men and women completed the same physical tasks...
Hypohydration effects on thermoregulation during moderate exercise in the coldRobert W Kenefick
Department of Kinesiology, The University of New Hampshire, New Hampshire Hall, NH 03824, Durham, USA
Eur J Appl Physiol 92:565-70. 2004..These data demonstrate that moderate intensity exercise in the cold while hypohydrated does not alter metabolic heat production, skin temperatures and heat loss, nor does it increase thermoregulatory and cardiovascular strain...
