This study aimed to evaluate changes in player’s sit and reach flexibility, 10m acceleration, and 35m velocity speed following a high velocity low amplitude manipulation (HVLAM) by a chiropractor.

Nineteen male student level rugby union players participated in this double blinded, randomised design study. Results demonstrated that a single encounter of pre-event HVLAM had a positive effect, increasing player’s flexibility scores, and decreasing their short distance sprinting performance times. 


Merkier, C., Cumine, A., & Gissane, C. (2012). The immediate effects of pre-event high velocity low amplitude manipulation on sit and reach flexibility, acceleration and velocity speed in rugby union. Chiropractic Evidence, 15, 94-95. Doi: 10.1016/j.clch.2012.06.018

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