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Burtscher, M; Faulhaber, M; Flatz, M; Likar, R; Nachbauer, W.
Effects of short-term acclimatization to altitude (3200 m) on aerobic and anaerobic exercise performance.
Int J Sports Med. 2006; 27(8): 629-35. Doi: 10.1055/s-2005-872823
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Co-authors Med Uni Graz: Likar Rudolf
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Abstract:: Aerobic exercise performance decreases upon ascent to altitude whereas anaerobic performance remains unchanged. Although the effects of 1 - 3 wk of altitude acclimatization on both aerobic and anaerobic exercise performance have been well studied, the effects of short-term altitude acclimatization (i.e., 45 h) on these parameters have not been well defined. Therefore, both aerobic and anaerobic exercise performance was evaluated in five healthy men (51.4 +/- 7.7 years, 175 +/- 4.2 cm, and 73.8 +/- 6.1 kg) at low altitude (LA, 600 m), upon acute exposure (approximately 1 - 3 h) to 3200 m (HA1) and on the third day of altitude exposure (HA3, 3200 m). Subjects performed three consecutive exercise tests, separated by approximately 1 - 3 h of rest, of various durations (i.e., 30 s, 5 min, and 50 min) on a cycle ergometer in each environmental condition. Anaerobic cycling performance (i. e., 30 s) was the same at LA, HA1, and HA3. Aerobic cycling performance (i. e., 5 min and 50 min) was reduced by 12.0 and 11.3 %, respectively, upon acute exposure to altitude. There was no change in the 5-min cycling performance but the 50-min cycling performance improved by 5.7 % from HA1 to HA3 which implies a 50 % recovery of the initial loss. These findings are important for individuals going to high altitude for work, for athletic competition, or recreation.
Find related publications in this database (using NLM MeSH Indexing): Adaptation, Physiological - administration & dosage; Altitude - administration & dosage; Ergometry - methods; Heart Rate - physiology; Humans - administration & dosage; Hypoxia - physiopathology; Male - administration & dosage; Middle Aged - administration & dosage; Oxygen - blood; Pulmonary Ventilation - physiology; Recovery of Function - physiology
Find related publications in this database (Keywords): hypoxia; short-term acclimatization; aerobic and anaerobic cycling performance