Influence of the Bar Position on Joint-Level Biomechanics During Isometric Pulling Exercises

Ahn, N, Kim, H, Krzyszkowski, J, Roche, S, and Kipp, K. Influence of the bar position on joint-level biomechanics during isometric pulling exercises. J Strength Cond Res 35(6): 1484–1490, 2021—The purpose this study was to investigate influence ankle, knee, hip net joint moments (NJMs), relative muscular effort (RME), vertical ground reaction forces (GRFs) exercises, such as midthigh pull. Eight female lacrosse athletes performed maximal pulls at 3 different positions (low: above patella, mid: midthigh, high: crease hip) while motion capture GRF data were recorded. Net calculated with inverse dynamics. Relative muscle defined ratio between dynamics NJMs maximum theoretical NJMs, which estimated regression-based moment-angle models. Peak NJM RME compared 2-way analyses variance (ANOVA), whereas GRFS a 1-way ANOVA. significantly greater in mid than high but did not differ low position. Bar influenced peak knee RME. Hip greatest position, Because extensor differed positions, not, joint-specific contributions likely reflected trade-off dominance respectively. This information should be considered interpretation their use assessing monitoring force-producing capacity lower body.