Acute effects of whole-body vibration on running gait in marathon runners

作者：Padulo Johnny^*; Filingeri Davide; Chamari Karim; Migliaccio Gian Mario; Calcagno Giuseppe; Bosco Gerardo; Annino Giuseppe; Tihanyi Jozsef; Pizzolato Fabio

来源：Journal of Sports Sciences, 2014, 32(12): 1120-1126.

DOI：10.1080/02640414.2014.889840

• internal work
• kinematic analysis
• heart rate
• iso-efficiency speed
• motor control

The aim of this study was to investigate the effects of a single bout of whole-body vibration (WBV) on running gait. The running kinematic of sixteen male marathon runners was assessed on a treadmill at iso-efficiency speed after 10 min of WBV and SHAM (i.e. no WBV) conditions. A high-speed camera (210Hz) was used for the video analysis and heart rate (HR) was also monitored. The following parameters were investigated: step length (SL), flight time (FT), step frequency (SF), contact time (CT), HR and the internal work (W-INT). Full-within one-way analysis of variance (ANOVA) of the randomised crossover design indicated that when compared to SHAM conditions, WBV decreased the SL and the FT by ~4% (P%26lt;0.0001) and ~7.2% (P%26lt;0.001), respectively, and increased the SF ~4% (P%26lt;0.0001) while the CT was not changed. This effect occurred during the first minute of running: the SL decreased ~3.5% (P%26lt; 0.001) and SF increased ~3.3% (P%26lt;0.001). During the second minute the SL decreased ~1.2% (P=0.017) and the SF increased ~1.1% (P=0.02). From the third minute onwards, there was a return to the pre-vibration condition. The W-INT was increased by ~4% (P%26lt;0.0001) during the WBV condition. Ten minutes of WBV produced a significant alteration of the running kinematics during the first minutes post exposure. These results provide insights on the effects of WBV on the central components controlling muscle function.

• 出版日期2014-7-21