两种不同复合运动(深蹲与硬拉)对急性神经肌肉和内分泌反应的影响。
Acute Neuromuscular and Endocrine Responses to Two Different Compound Exercises: Squat vs. Deadlift.
机构信息
School of Sport and Exercise, Massey University, Palmerston North, New Zealand.
Universal College of Learning, Palmerston North, New Zealand.
出版信息
J Strength Cond Res. 2019 Sep;33(9):2381-2387. doi: 10.1519/JSC.0000000000002140.
Barnes, MJ, Miller, A, Reeve, D, and Stewart, RJ. Acute neuromuscular and endocrine responses to two different compound exercises: squat vs. deadlift. J Strength Cond Res 33(9): 2381-2387, 2019-Anecdotally, it is believed that the deadlift exercise brings about greater levels of central fatigue than other exercises; however, no empirical evidence exists to support this view. In addition, little is known about the acute endocrine response to heavy deadlift exercise and how this may differ from other similar compound exercises. Therefore, the aim of this study was to identify and compare the acute, neuromuscular and endocrine responses to squat and deadlift exercises. Ten resistance-trained males completed 8 sets of 2 repetitions at 95% of 1 repetition maximum. Maximum voluntary isometric contraction (MVIC) force of the quadriceps, along with measures of central (voluntary activation [VA] and surface electromyography) and peripheral (electrically evoked control stimulus) fatigue were made before and 5 and 30 minutes after exercise. In addition, salivary testosterone and cortisol were measured at these same time points. MVIC was reduced after the completion of both exercises (p = 0.007); however, no difference between exercises was evident. Similarly, although VA changed over time (p = 0.0001), no difference was observed between exercises. As a measure of peripheral fatigue, force from the control stimulus changed over time (p = 0.003) with a greater decrease evident after the squat (p = 0.034). Electromyography was reduced over time (p = 0.048) but no difference was seen between exercises. No change was seen in testosterone and cortisol. Although a greater absolute load and larger volume load were completed for the deadlift, no difference in central fatigue was evident between the 2 compound exercises. The greater peripheral fatigue observed after squat exercise may be due to the greater work completed by the quadriceps with this exercise. These results suggest that separate periodization, tapering, and programming considerations may be unnecessary when using the squat and deadlift to develop muscular strength.
巴恩斯、米勒、里夫和斯图尔特。两种不同复合运动(深蹲与硬拉)对急性神经肌肉和内分泌的影响。《力量与体能研究杂志》33(9):2381-2387,2019- 据传闻,硬拉运动比其他运动带来更大的中枢疲劳程度;但是,没有实证证据支持这种观点。此外,对于大负荷硬拉运动对急性内分泌的影响以及这如何与其他类似的复合运动不同知之甚少。因此,本研究的目的是确定和比较深蹲和硬拉运动的急性、神经肌肉和内分泌反应。10 名有经验的男性完成了 8 组 2 次重复,重量为 1 次最大重复重量的 95%。在运动前和运动后 5 分钟和 30 分钟时,测量股四头肌的最大等长收缩(MVIC)力,以及中枢(主动激活[VA]和表面肌电图)和外周(电诱发控制刺激)疲劳的测量。此外,在相同的时间点测量唾液中的睾酮和皮质醇。两种运动后 MVIC 均降低(p = 0.007);但是,两种运动之间没有差异。同样,尽管 VA 随时间变化(p = 0.0001),但两种运动之间没有差异。作为外周疲劳的测量,控制刺激的力随时间变化(p = 0.003),深蹲后下降更明显(p = 0.034)。肌电图随时间减少(p = 0.048),但两种运动之间没有差异。睾酮和皮质醇没有变化。尽管硬拉的绝对负荷和更大的容量负荷更大,但两种复合运动之间的中枢疲劳没有差异。深蹲运动后观察到的更大的外周疲劳可能是由于股四头肌完成的工作量更大。这些结果表明,在使用深蹲和硬拉来发展肌肉力量时,不需要对中枢疲劳进行单独的分期、逐渐减少和编程考虑。