Effect of exercise intensity on the slow component of oxygen uptake in decremental work load exercise

• Autorzy: Yano T. , Yunoki T. , Matsuura R. , Ogata H.
• Języki publikacji: EN

Abstrakty

EN

The paper sought to determine the exercise intensity where the slow component of oxygen uptake (o2) first appears in decremental work load exercise (DLE). Incremental work load exercise (ILE) was performed with an increment rate of 15 watts (W) per minute. In DLE, power outputs were decreased by 15 W per minute, from 120 (DLE120), 160 (DLE160), 200 (DLE200) and 240 (DLE240) W, respectively. The slopes of o2 against the power output were obtained in the lower section from 0 to 50 W in all DLEs, and in the upper section from 80 to 120 W in DLE160 and from 100 to 150 W in DLE200 and DLE240. The power output at exhaustion in ILE was 274 ± 20 W. The power output at the ventilatory threshold (VT) obtained in ILE was 167 ± 22 W. The initial power output in DLE160 was near the power output at VT. The slopes obtained in the upper sections were 11.4 ± 0.9 ml • min-1 • W-1 in DLE160, 12.8 ± 0.8 ml • min-1 • W-1 in DLE200, and 14.8 ± 1.1 ml • min-1 • W-1 in DLE240. The slope obtained in DLE120 was 10.9 ± 0.6 ml • min-1. There were no differences in slope between the upper and lower sections in DLE160 but there were significant differences in slopes between the upper and lower sections in DLE200 and DLE240. Thus, the slow component, which could be observed as a steeper slope in DLE, began to increase when the initial power output in DLE was near to VT.

Słowa kluczowe

EN

exercise intensity; decrement exercise; oxygen uptake; slow component

• Wydawca: -
• Czasopismo: Journal of Physiology and Pharmacology
• Rocznik: 2004
• Tom: 55
• Numer: 2
• Opis fizyczny: p.315-324,fig.,ref.

Twórcy

autor

Yano T.

• Hokkaido University, Kita-ku, Sapporo, Japan

autor

Yunoki T.

autor

Matsuura R.

autor

Ogata H.