摘要
Purpose: The purpose of this study was to determine the extent that a static stretching program could increase heart rate (HR) and oxygen consumption (VO2), and if the increases were sufficient to serve as a warm-up for aerobic activity. Methods: The HR and VO2 of 15 male and 16 female college students were measured after either 12 min of passive static stretching (SS), or 12 rain pseudo-stretching (PS), which consisted of moving through the stretching positions without placing the muscles on stretch. Four different lower body stretches were used with each stretch held for 30 s before the participant moved to a different position, with the circuit being repeated four times. VO2 was determined by averaging breath-by-breath measures over the total 12 min. HR was obtained every 30 s and the 24 values were averaged. Warm-up benefit was determined from the 02 deficit accrued during 7-min cycling at 60% VOzmax. Results: HR (beats/rain, mean 4. SD) for SS (84 ± 11) was a significant (p 〈 0.05) 9% greater than PS (78 ± 12). Similarly, VO2 (mL/min, mean 4. SD) for SS (0.53 ± 0.13) was a significant 44% greater than PS (0.38 ± 0.11). The O2 deficit (L, mean 4, SD) for SS (0.64 ± 1.54) was not different from PS (0.72 ± 1.61). Conclusion: These data indicate that passive static stretching increases both HR and VO2, indicating that metabolic activity can be increased without muscle activation. The magnitude of the increases, however, is not sufficient to elicit a warm-up effect.
目的:确定静态拉伸练习可增加心率以及耗氧量的范围,以及该增加量是否满足有氧运动热身要求。方法:15名男大学生与16名女大学生在12min被动静态拉伸或者12min假拉伸(采用姿势移动,但未将肌肉拉伸开)后测量心率和耗氧量。共进行4种不同的下半身拉伸,每种拉伸持续30 s,再转向另一种拉伸,重复4轮。通过测量12 min内逐次呼吸平均量确定耗氧量。每30 s获取一次心率,取24次测量心率的平均值。测量耗氧量为最大值的60%时骑自行车7 min积累的氧赤字,从而确定热身效果。结果:被动静态拉伸的心率和耗氧量均显著高于假拉伸,分别高出7.5%((84±11)次/min vs.(78±12)次/min),p<0.05)和71%((0.53±0.13)mL/min vs.(0.38±0.11)mL/min,p<0.05)。氧赤字无显著差异((0.64±1.54)L vs.(0.72±1.61)L)。结论:被动静态拉伸能提高心率及耗氧量,说明代谢活动在没有肌肉激活的条件下依然可以增加,但提高的程度不足以达到热身效果。