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Utilizing Microsensor Technology to Quantify Match Demands in Collegiate Women's Volleyball.

Vlantes Travis G.; Readdy, Tucker
Journal of Strength & Conditioning Research: Post Acceptance: August 26, 2017
doi: 10.1519/JSC.0000000000002208
Original Research: PDF Only

The purpose of this study was to quantify internal and external load demands of women's NCAA Division I collegiate volleyball competitions using microsensor technology and session rating of perceived exertion (S-RPE). Eleven collegiate volleyball players wore microsensor technology (Optimeye S5; Catapult Sports USA, Chicago, IL) during fifteen matches played throughout the 2016 season. Parameters examined include: Player load (PL), High impact load (HI PL), percentage of high impact load (% HI PL), Explosive efforts (EE) and jumps. S-RPE was collected twenty minutes post-match using a modified Borg scale. The relationship between internal and external load was explored, comparing S-RPE data with the microsensor metrics (PL, HI PL, % HI PL, EE, Jumps). The setter had the greatest mean PL and highest number of jumps of all positions in a 5-1 system, playing all six rotations. Playing four sets yielded a mean PL increase of 25.1% over three sets, while playing five sets showed a 31.0% increase in PL. A multivariate analysis of variance (MANOVA) revealed significant differences (p <.01) across all position groups when examining % HI PL and jumps. Cohen's d analysis revealed large (>= 0.8) effect sizes for these differences. Defensive specialists recorded the greatest mean S-RPE values over all fifteen matches (886 +/- 384.6). Establishing positional load demands allows coaches, trainers, and strength and conditioning professionals to implement training programs for position specific demands, creating consistent peak performance and reducing injury risk.

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