title: Acute effects of whole-body vibration on running gait in marathon runners.
abstract: 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 (210 Hz) 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 (WINT). 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 < 0.0001) and ~7.2% (P < 0.001), respectively, and increased the SF ~4% (P < 0.0001) while the CT was not changed. This effect occurred during the first minute of running: the SL decreased ~3.5% (P < 0.001) and SF increased ~3.3% (P < 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 WINT was increased by ~4% (P < 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.
authors.affiliation: a Tunisian Research Laboratory "Sports Performance Optimization" , National Center of Medicine and Science in Sport , Tunis , Tunisia.
authors.forename: Johnny
authors.initials: J
authors.lastname: Padulo
authors.forename: Davide
authors.initials: D
authors.lastname: Filingeri
authors.forename: Karim
authors.initials: K
authors.lastname: Chamari
authors.forename: Gian Mario
authors.initials: GM
authors.lastname: Migliaccio
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Calcagno
authors.forename: Gerardo
authors.initials: G
authors.lastname: Bosco
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Annino
authors.forename: Jozsef
authors.initials: J
authors.lastname: Tihanyi
authors.forename: Fabio
authors.initials: F
authors.lastname: Pizzolato
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D018592:Cross-Over Studies; D005684:Gait / Q000502:physiology*; D006339:Heart Rate; D006801:Humans; D008297:Male; D008991:Monitoring, Physiologic; D018482:Muscle, Skeletal / Q000502:physiology; D010807:Physical Endurance / Q000502:physiology*; D012420:Running / Q000502:physiology*; D014732:Vibration; D014741:Video Recording