Reliability and validity of a new device to measure isometric strength in polyarticular exercises

摘要

Backgorund. The purpose of this study was to assess the valid- ity of a new device to evaluate isometric strength during mul- ti-joint exercise such as the squat or bench press. Methods. The device used and electric motor-driven bar to simul- Taneously generate and measure forces during weight lifting Exercises. This new device and a force platform measured the Forces generated by either the motor on a fixed telescopic steel Girder (passive condition) or a subject pushing vertically against The bar from three squat positions (active condition).