Physiological and Performance Responses to a Training Camp in the Heat in Professional Australian Football Players
| Autor: | Martin Buchheit, Justin Cordy, Aaron J. Coutts, Sebastien Racinais, Johann C. Bilsborough, Pitre C. Bourdon |
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| Rok vydání: | 2014 |
| Předmět: |
Male
medicine.medical_specialty Time Factors Hot Temperature Temperate environment Acclimatization Sweating Physical Therapy Sports Therapy and Rehabilitation Plasma volume Running Young Adult Animal science Heart Rate Task Performance and Analysis Heart rate Humans Medicine Orthopedics and Sports Medicine Heat acclimatization Plasma Volume Sweat Football players business.industry Respiration Sodium Australia Skin temperature Humidity Motor Skills Sweat sodium Exercise Test Physical Endurance Physical therapy Skin Temperature business Sport Sciences Sports Physical Conditioning Human |
| Zdroj: | International Journal of Sports Physiology and Performance. 9:598-603 |
| ISSN: | 1555-0273 1555-0265 |
| Popis: | Purpose:To examine the physiological and performance responses to a heat-acclimatization camp in highly trained professional team-sport athletes.Methods:Eighteen male Australian Rules Football players trained for 2 wk in hot ambient conditions (31–33°C, humidity 34–50%). Players performed a laboratory-based heat-response test (24-min walk + 24 min seated; 44°C), a YoYo Intermittent Recovery Level 2 Test (YoYoIR2; indoor, temperate environment, 23°C) and standardized training drills (STD; outdoor, hot environment, 32°C) at the beginning and end of the camp.Results:The heat-response test showed partial heat acclimatization (eg, a decrease in skin temperature, heart rate, and sweat sodium concentration, P < .05). In addition, plasma volume (PV, CO rebreathing, +2.68 [0.83; 4.53] mL/kg) and distance covered during both the YoYoIR2 (+311 [260; 361] m) and the STD (+45.6 [13.9; 77.4] m) increased postcamp (P < .01). None of the performance changes showed clear correlations with PV changes (r < .24), but the improvements in running STD distance in hot environment were correlated with changes in hematocrit during the heat-response test (r = –.52, 90%CI [–.77; –.12]). There was no clear correlation between the performance improvements in temperate and hot ambient conditions (r < .26).Conclusion:Running performance in both hot and temperate environments was improved after a football training camp in hot ambient conditions that stimulated heat acclimatization. However, physiological and performance responses were highly individual, and the absence of correlations between physical-performance improvements in hot and temperate environments suggests that their physiological basis might differ. |
| Databáze: | OpenAIRE |
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