Cochrane D J, Stannard S R, Firth E C, Rittweger J
Sport Management and Coaching, Department of Management, Massey University, Palmerston North, New Zealand.
Clin Physiol Funct Imaging. 2010 Jul;30(4):223-9. doi: 10.1111/j.1475-097X.2010.00931.x. Epub 2010 May 11.
The aim of this study was to investigate the influence of shallow dynamic squatting (DS) versus static squatting (SS) with or without concurrent side-to-side alternating whole-body vibration (WBV) on vastus lateralis temperature and cardiovascular stress as indicated by heart rate (HR). Ten participants (five men, five women) participated in four interventions [DS with WBV (DS+), DS without WBV (DS-), SS with WBV (SS+), SS without WBV (SS-)] 48 h apart, in a randomized order. The interventions were preceded by a approximately 20-min rest period, consisted of 10 mins with or without WBV (26 or 0 Hz) with SS (40 degrees of knee flexion) or DS (55 degrees of knee flexion, at a cadence of 50 bpm) where SS+ and DS- were metabolically matched. Muscle (T(m)), core (T(c)), skin temperature (T(sk)), HR and VO(2) were recorded during each intervention. For T(m), there was a time (P<0.01) and WBV (P<0.01) effect but no squat effect was evident, and there was time xWBV interaction effect (P<0.01). In all four interventions, the work load was too low to cause cardiovascular stress. Instead normal, moderate physiological effects of exercise on autonomic control were observed as indicated by HR; there were no significant increases in T(sk) or T(c). There appears to be no benefit in performing an unloaded, shallow DS+ at a tempo of 50 bpm as T(m,) HR, VO(2) are likely to be increased by the same amount and rate without WBV. However, combining SS with WBV could be advantageous to rapidly increasing soft tissue temperature prior to performing rehabilitation exercises when dynamic exercise cannot be performed.
本研究旨在探讨浅动态深蹲(DS)与静态深蹲(SS),以及有无同时进行左右交替全身振动(WBV)对股外侧肌温度和以心率(HR)表示的心血管应激的影响。十名参与者(五名男性,五名女性)以随机顺序,每隔48小时参与四种干预措施[有WBV的DS(DS+)、无WBV的DS(DS-)、有WBV的SS(SS+)、无WBV的SS(SS-)]。在干预前有大约20分钟的休息时间,包括10分钟有或无WBV(26或0赫兹)的SS(膝关节屈曲40度)或DS(膝关节屈曲55度,节奏为每分钟50次),其中SS+和DS-在代谢上相匹配。在每次干预过程中记录肌肉温度(T(m))、核心温度(T(c))、皮肤温度(T(sk))、HR和VO(2)。对于T(m),存在时间效应(P<0.01)和WBV效应(P<0.01),但深蹲效应不明显,且存在时间×WBV交互效应(P<0.01)。在所有四种干预措施中,工作量过低,无法引起心血管应激。相反,如HR所示,观察到运动对自主控制有正常、适度的生理影响;T(sk)或T(c)没有显著升高。以每分钟50次的节奏进行无负荷浅DS+似乎没有益处,因为在没有WBV的情况下,T(m)、HR、VO(2)可能会以相同的幅度和速率增加。然而,当无法进行动态运动时,将SS与WBV相结合可能有利于在进行康复锻炼之前快速提高软组织温度。