Wilterdink E J, Ballor D L, Keesey R E
Department of Psychology, University of Wisconsin-Madison 53706.
Int J Obes Relat Metab Disord. 1993 Mar;17(3):139-43.
The body weight, body composition, and daily (post-exercise) energy expenditure of five groups of male rats were examined following 1, 2, 4, 6 or 8 weeks of daily (1 h) swim training. Rats that swam daily weighed less than sedentary controls and had smaller adipose and lean tissue masses. The size of these body weight and composition changes grew as daily training progressed. Relative to sedentary rats, the 24 h (post-exercise) expenditure of swim-trained rats, expressed either per BW0.75kg or per g of body protein, was significantly higher after two weeks of daily training. This training-induced elevation in daily (post-exercise) expenditure likewise grew larger as training continued. After eight weeks, rats that swam, although now maintaining significantly smaller lean and adipose masses, expended more calories daily (post-exercise) than sedentary rats (42.2 vs. 39.2 kcal/day respectively). Thus, though exercise-induced elevations in expenditure have been associated with an increased lean tissue mass, other factors are apparently responsible for the progressive elevation (from sedentary levels) of 24 h expenditure found here with extended daily swim training.
对五组雄性大鼠进行为期1、2、4、6或8周的每日（1小时）游泳训练后，检测了它们的体重、身体组成以及每日（运动后）能量消耗。每日游泳的大鼠体重低于久坐不动的对照组，脂肪组织和瘦组织质量也较小。随着每日训练的进行，这些体重和组成变化的幅度逐渐增大。相对于久坐不动的大鼠，每日训练两周后，游泳训练大鼠的24小时（运动后）能量消耗，以每BW0.75kg或每克身体蛋白质来表示，均显著更高。随着训练的持续，这种由训练引起的每日（运动后）能量消耗的升高同样变得更大。八周后，虽然游泳的大鼠此时保持着明显更小的瘦组织和脂肪组织质量，但它们每日（运动后）消耗的卡路里比久坐不动的大鼠更多（分别为42.2千卡/天和39.2千卡/天）。因此，尽管运动引起的能量消耗增加与瘦组织质量增加有关，但其他因素显然是这里通过每日延长游泳训练发现的24小时能量消耗（相对于久坐水平）逐渐升高的原因。
