Annino Giuseppe, Iellamo Ferdinando, Palazzo Francesco, Fusco Augusto, Lombardo Mauro, Campoli Francesca, Padua Elvira
Movement Science Institute Department of Systems Medicine, Faculty of Medicine and Surgery, Tor Vergata University of Rome Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Roma Open University Clinical Laboratory of Experimental Medicine, Fondazione Santa Lucia IRCCS I.R.C.C.S. San Raffaele Pisana, Rome, Italy.
Medicine (Baltimore). 2017 Aug;96(33):e7629. doi: 10.1097/MD.0000000000007629.
This study was aimed to investigate the neuromuscular activity after 10 minutes of exposure to a whole body vibration (WBV) session.Twenty male young adults (24.8 ± 2.5 year olds) were randomized and divided into 2 groups: the vibration group (VG) was exposed to 10 minutes of WBV at 35 Hz; performed 10 minutes of WBV at 35 Hz (displacement = 5 mm; magnitude = 5 g); the nonvibrated group (NVG) was the placebo group that maintained the same position on the plate but without exposure to any type of vibration. Subjects were evaluated with counter movement jump (CMJ) and muscular flexibility by means of electromyographic (EMG) analysis recorded on the vastus lateralis (VL), vastus medialis (VM), biceps femoris (BF), and gastrocnemius lateralis (LG).The 10 minutes of WBV showed an increase in muscular flexibility, associated with a decrease of EMG activity in BF (P < .01) and jump height. The latter was associated with a reduction of EMGs activity in BF (P < .01). The control group did not show any significant difference in all considered parameters.These results support the hypothesis that 10 minutes of WBV had effects on flexibility and explosive strength performance influencing neuromuscular behavior through inhibitor effects on antagonist muscles more than the stretch reflex activity on agonist muscles.
本研究旨在调查全身振动（WBV）训练10分钟后的神经肌肉活动情况。20名男性青年（24.8±2.5岁）被随机分为2组：振动组（VG）接受35赫兹的全身振动10分钟；以35赫兹进行10分钟的全身振动（位移=5毫米；振幅=5克）；非振动组（NVG）为安慰剂组，其在平板上保持相同姿势，但不接受任何类型的振动。通过记录股外侧肌（VL）、股内侧肌（VM）、股二头肌（BF）和腓骨外侧肌（LG）的肌电图（EMG）分析，对受试者进行反向移动跳跃（CMJ）和肌肉柔韧性评估。10分钟的全身振动显示肌肉柔韧性增加，同时股二头肌的肌电图活动减少（P<0.01），跳跃高度降低。后者与股二头肌的肌电图活动减少有关（P<0.01）。对照组在所有考虑的参数上均未显示出任何显著差异。这些结果支持了这样的假设，即10分钟的全身振动对柔韧性和爆发力表现有影响，通过对拮抗肌的抑制作用而非对主动肌的牵张反射活动来影响神经肌肉行为。
