一流サイクリストの間欠的低圧トレーニングの有気的無気的作業能およびパフォーマンスに及ぼす影響

概要

論文の詳細を見る
The effect of intermittent hypobaric hypoxia training was examined in professional cyclists, aged 19-27yrs. They trained at a simulated altitude of 2,000m for 5 months, during which they continued their daily training, at sea level. Hypobaric hypoxia training consisted of a 30 min. aerobic and short-term exhaustive anaerobic exercises. Aerobic and anaerobic powers were estimated by a cycle ergometer test. Muscle metabolism during and after leg extension exercise at sea level were determined using ^<31>P-NMR spectroscopy. Phosphocreatine (PCr), inorganic phosphate (Pi) and intracellular pH during exercise were used as indices of oxidative phosphorylation capacity in muscle. Aerobic power, determined by maximal work and work rate corresponding to the lactate threshold level, showed no significant change after hypoxia training. Maximal anaerobic power, determined by a 10s-maximal pedalling, was increased significantly after training from 1286±74W (mean±SD) to 1346 ±76W. The ratio of PCr/(PCr+ Pi) during the later stage of exercise tended to be higher after training. Cycling time at a racing track for 800m decreased significantly after training, from 52.93±1.42s to 52.26±1.12s. These results suggest that anaerobic capacity of competitive cyclists is enhanced and cycle performance is improved by intermittent hypobaric hypoxia training.
日本運動生理学会の論文
1999-01-30