Physiological Responses in Alpine Skiers during On-Snow Training Simulation in the Cold

Abstract

This study examined the physiological responses to cold stimulus during intermittent high-intensity exercise simulating on-snow alpine ski training. 7 male alpine skiers performed intermittent high-intensity exercises composed of 4 bouts of cycling exercise at 140% V˙O_2max intensity for 30 s with 10-min rests on a cycle ergometer in cold (1°C) and control (22°C) conditions. The subjects wore racing suits, middle layers and half pants designed for alpine skiers. Rectal temperature and mean skin temperature were lower in the cold condition than in the control condition (36.8±0.5 vs. 37.1±0.1°C and 28.4±0.6 vs. 33.3±0.6°C, respectively). Oxygen consumption during rests and the last 2 bouts of exercise was higher in the cold condition than in the control condition. Although plasma noradrenaline and serum triglyceride were higher in the cold condition than in the control condition, plasma glucose, adrenaline and serum glycerol were lower. Serum free fatty acid and plasma lactate concentrations did not differ significantly between the 2 conditions. These results indicate that a cold stimulus affects body temperature and energy metabolism and may lead to a decrease in exercise capacity in alpine skiers during on-snow training.

Key words

cold environments - thermoregulation - energy metabolism - intermittent high-intensity exercise - alpine skiing

• References

• 1 Bleakley CM, Costello JT, Glasgow PD. Should athletes return to sport after applying Ice? A systematic review of the effect of local cooling on functional performance. Sports Med 2012; 42: 69-87
• 2 Bleakley CM, Costello JT. Do thermal agents affect range of movement and mechanical properties in soft tissues? A systematic review. Arch Phys Med Rehabil 2013; 94: 149-163
• 3 Borg GA. Psychophysical bases of perceived exertion. Med Sci Sports Exerc 1982; 14: 377-381
• 4 Brožek J, Grande F, Anderson JT, Keys A. Densitometric analysis of body composition: Revision of some quantitative assumptions. Ann N Y Acad Sci 1963; 26: 113-140
• 5 Bogdanis GC, Nevill ME, Boobis LH, Lakomy HK. Contribution of phosphocreatine and aerobic metabolism to energy supply during repeated sprint exercise. J Appl Physiol 1996; 80: 876-884
• 6 Costello JT, Donnelly AE. Cryotherapy and joint position sense in healthy participants: a systematic review. J Athl Train 2010; 45: 306-316
• 7 Doubt TJ, Hsieh SS. Additive effects of caffeine and cold water during submaximal leg exercise. Med Sci Sports Exerc 1997; 23: 435-442
• 8 Doubt TJ. Physiology of exercise in the cold. Sports Med 1991; 11: 367-681
• 9 Galloway SD, Maughan RJ. Effects of ambient temperature on the capacity to perform prolonged cycle exercise in man. Med Sci Sports Exerc 1997; 29: 1240-1249
• 10 Giesbrecht GG. The respiratory system in a cold environment. Aviat Space Environ Med 1995; 66: 890-902
• 11 Haman F, Péronnet F, Kenny GP, Massicotte D, Lavoie C, Scott C, Weber JM. Effect of cold exposure on fuel utilization in humans: plasma glucose, muscle glycogen, and lipids. J Appl Physiol 2002; 93: 77-84
• 12 Haman F, Scott CG, Kenny GP. Fueling shivering thermogenesis during passive hypothermic recovery. J Appl Physiol 2007; 103: 1346-1351
• 13 Harriss DJ, Atkinson G. Update – Ethical Standards in Sport and Exercise Science Research. Int J Sports Med 2011; 32: 819-821
• 14 Kristiansen S, Hargreaves M, Richter EA. Progressive increase in glucose transport and GLUT-4 in human sarcolemmal vesicles during moderate exercise. Am J Physiol 1997; 272: E385-E389
• 15 McCartney N, Spriet LL, Heigenhauser GJ, Kowalchuk JM, Sutton JR, Jones NL. Muscle power and metabolism in maximal intermittent exercise. J Appl Physiol 1986; 60: 1164-1169
• 16 Miyagi O, Tsukanaka A, Matsumoto H, Ogawa K, Sakurai K, Kitagawa K. Equations for predicting body density in male and female athletes. Jpn Soc Phys Fit Sports Med 1994; 43: 415-425 (In Japanese with English abstract, figures and tables)
• 17 Nimmo M. Exercise in the cold. J Sports Sci 2004; 22: 898-915
• 18 Oksa J, Rintamäki H, Rissanen S. Muscle performance and electromyogram activity of the lower leg muscles with different levels of cold exposure. Eur J Appl Physiol 1997; 75: 484-490
• 19 Ramatahn NL. A new weighting system for mean surface temperature of the human body. J Appl Physiol 1964; 19: 531-533
• 20 Saibene F, Cortili G, Gavazzi P, Magistri P. Energy sources in alpine skiing (giant slalom). Eur J Appl Physiol 1985; 53: 312-316
• 21 Sandsund M, Saursaunet V, Wiggen O, Renberg J, Færevik H, van Beekvelt MC. Effect of ambient temperature on endurance performance while wearing cross-country skiing clothing. Eur J Appl Physiol 2012; 112: 3939-3947
• 22 Sargeant AJ. Effect of muscle temperature on leg extension force and short-term power output in humans. Eur J Appl Physiol 1987; 56: 693-698
• 23 Shephard RJ. Metabolic adaptations to exercise in the cold. An update. Sports Med 1993; 16: 266-289
• 24 Starkie RL, Hargreaves M, Lambert DL, Proietto J, Febbraio MA. Effect of temperature on muscle metabolism during submaximal exercise in humans. Exp Physiol 1999; 84: 775-784
• 25 Vallerand AL, Jacobs I. Rates of energy substrates utilization during human cold exposure. Eur J Appl Physiol 1989; 58: 873-878
• 26 Veicsteinas A, Ferretti G, Margonato V, Rosa G, Tagliabue D. Energy cost of and energy sources for alpine skiing in top athletes. J Appl Physiol 1984; 56: 1187-1190
• 27 Weller AS, Millard CE, Stroud MA, Greenhaff PL, Macdonald IA. Physiological responses to a cold, wet, and windy environment during prolonged intermittent walking. Am J Physiol 1997; 41: R226-R233
• 28 Weller AS, Millard CE, Stroud MA, Greenhaff PL, Macdonald IA. Physiological responses to cold stress during prolonged intermittent low- and high-intensity walking. Am J Physiol 1997; 41: R2025-R2033
• 29 Yamamoto S, Matsui N, Kitagawa K. Energy metabolism in gaiant slalom and slalom skiing of Japanese alpine ski racers. Jpn J Biomech Sports Exerc 1999; 3: 95-102 (In Japanese with English abstract figures and tables)
• 30 Yamamoto S, Kitagawa K. Effect of wind and rain on thermoregulatory and cardiovascular-respiratory responses during running in humans. Jpn J Phys Fitness Sports Med 2009; 58: 247-254 (In Japanese with English abstract figures and tables)
• 31 Yamane M, Oida Y, Ohnishi N, Matsumoto T, Kitagawa K. Effects of wind and rain on thermal responses of humans in a mildly cold environment. Eur J Appl Physiol 2010; 109: 117-123