Eisuke Ochi, Hisashi Ueda, Yosuke Tsuchiya, Karina Kozaki, Koichi Nakazato.
This study aimed to establish a new ECCs model for the flexor pollicis brevis muscle (FPBM) and evaluate both motor nerve conduction velocity (MCV) and sensory nerve conduction velocity (SCV). Twelve healthy young men performed 100 maximal ECCs at 60 deg/sec on their non-dominant hand's FPBM using a custom-made torque dynamometer, with their dominant hand serving as the control. Measurements of maximal voluntary contraction (MVC), range of motion (ROM), delayed onset muscle soreness (DOMS), MCV, and SCV were taken before, immediately after, and 1, 2, and 5 days post-ECCs. Results showed significant increases in MVC, ROM, and DOMS in the ECC group compared to pre-ECC and control. MCV significantly decreased immediately after exercise in the ECC group, while SCV showed no significant changes. The study concluded that the new ECCs model induced muscle damage and motor nerve dysfunction similar to previous studies on other muscles.
