ABSTRACT
Previous studies related to grip strength focused on exploring the maximum and sub-maximum grip strength or maximum endurance time for gripping exertions for bare and gloved hands. However, no literatures were found investigating suitable duration for sampling of consecutive maximum grip strength without fatigue. This study used grip dynamometer and electromyography (EMG) module to collect EMG signals for four forearm muscles when performing consecutive maximum gripping exertions for bare and gloved hands. Ten males and eight females participated in this experiment. The suitable sampling duration is calculated as the time that 90% of males and 75% of females can perform consecutive MVC gripping exertions without fatigue. Based on Joint analysis of EMG spectrum and amplitude (JASA), the subjects can follow the recovery time of 2 minutes of Caldwell’s regimen between consecutive grip exertions for bare and gloved hand conditions
the subject can maintain 80% of the maximum grip strength during consecutive maximum gripping exertions. For each of the four different gripping conditions (bare hand/2 minutes rest, gloved hand/2 minutes rest, bare hand/4 minutes rest, gloved hand/4 minutes rest), the suitable sampling duration that 90% of males and 75% of females can perform consecutive MVC gripping exertions without fatigue were 17、8、48、38 minutes and 47、32、98、58 minutes, respectively.
