探討不同進食狀態在不同運動強度對能量受質利用的影響

The Effect of Feeding State on Substrate Utilization during Different Exercise Intensities

陳國生(Kuo-Sheng Chen) ； 劉明宜(Ming-Yi Liu) ； 陳順泉(Shung-Quan Chen) ； 方進隆(Chin-Lung Fung)

《臺灣營養學會雜誌》 36卷1期 (2011/03) Pp. 9-18

https://doi.org/10.6691/NSJ.201103_36(1).0002

摘要

The purpose of this study was to investigate the effect of feeding state on metabolic substrate utilization during different exercise intensities. Twelve healthy male subjects performed treadmill exercise in a random and counter-balanced order for 60 mm including three sessions (20 min each ) of 45%, 65% and 85% VO(subscript 2max) sequential exercise after either 6h fasting (fasted, Ft) or 1h after a standard meal (500 Kcal, CHO: 55% Protein: 15% Fat: 35%) fed. Respiratory exchange ratios (RER), blood glucose (BG) and blood lactate (BL) concentrations were measured throughout each trial. RER was significantly lower in Ft state during 45% and 65% but not 85% VO(subscript 2max) exercise. Neither BL nor BG was found different between Ft and Fd state during any exercise intensity except that BG was lower in Fd state during 85% VO(subscript 2max). These data suggest that short-term fasting promotes fatty acid utilization particularly during low-and moderate-aerobic exercise but not high-intensity exercise, which relies more on carbohydrates. The lower BG may have resulted from a synergistic effect of post-meal hyperinsulinemia and high-intensity exercise causing the glucose transporters promotion ultimately resulting in a greater demand for carbohydrate.

關鍵字

脂肪代謝 ； 空腹狀態 ； 胰島素反應

並列摘要

The purpose of this study was to investigate the effect of feeding state on metabolic substrate utilization during different exercise intensities. Twelve healthy male subjects performed treadmill exercise in a random and counter-balanced order for 60 mm including three sessions (20 min each ) of 45%, 65% and 85% VO(subscript 2max) sequential exercise after either 6h fasting (fasted, Ft) or 1h after a standard meal (500 Kcal, CHO: 55% Protein: 15% Fat: 35%) fed. Respiratory exchange ratios (RER), blood glucose (BG) and blood lactate (BL) concentrations were measured throughout each trial. RER was significantly lower in Ft state during 45% and 65% but not 85% VO(subscript 2max) exercise. Neither BL nor BG was found different between Ft and Fd state during any exercise intensity except that BG was lower in Fd state during 85% VO(subscript 2max). These data suggest that short-term fasting promotes fatty acid utilization particularly during low-and moderate-aerobic exercise but not high-intensity exercise, which relies more on carbohydrates. The lower BG may have resulted from a synergistic effect of post-meal hyperinsulinemia and high-intensity exercise causing the glucose transporters promotion ultimately resulting in a greater demand for carbohydrate.

並列關鍵字

tat metabolism ； fasted state ； hyperinsulinemia