Force-Time–Curve Comparison Between Weight-Lifting Derivatives

The force-production characteristics of 3 weight-lifting derivatives were examined by comparing the force–time curves of each exercise. Sixteen resistance-trained men performed repetitions of the hang power clean (HPC), jump shrug (JS), and hang high pull (HHP) on a force platform at several relative loads. Relative peak force (PF Rel ), relative impulse (IMP Rel ), peak rate of force development (PRFD), and time-normalized force–time curves of each exercise were compared. The JS produced greater PF Rel than the HPC ( P < .001, d = 1.38) and HHP ( P < .001, d = 1.14), while there was no difference between the HPC and HHP ( P = .338, d = 0.26). Similarly, the JS produced greater IMP Rel than the HPC ( P < .001, d = 0.52) and HHP ( P = .019, d = 0.36). The HHP also produced greater IMP Rel than the HPC ( P = .040, d = 0.18). Finally, the JS produced greater PRFD than the HPC ( P < .001, d = 0.73) and HHP ( P = .001, d = 0.47), while there was no difference between the HPC and HHP ( P = .192, d = 0.22). The HPC, JS, and HHP force–time profiles were similar during the first 75–80% of the movement; however, the JS produced markedly different force–time characteristics in the final 20–25% of the movement. The JS produced superior force-production characteristics, namely PF Rel , IMP Rel , and PRFD, as well as a unique force–time profile, compared with the HPC and HHP across several loads.