Relationship between hand dynamometer results and blood plasma lactic acid as indicators of muscle fatigue

Fatigue is a protective mechanism of the body that prevents continuous injury and allows recovery after rest. This study aimed to determine the correlation between the results of examining the level of muscle fatigue in the hands of computer operators between the measurement of the blood plasma lactic acid method and the hand dynamometer method. This study was conducted using an observational, cross-sectional design. The study population consisted of male computer operators aged 20–30 years. The sample was selected based on the following inclusion criteria: no history of specific medical conditions such as diabetes mellitus, heart disease, or kidney disorders, and at least one year of experience as a computer operator. Based on these criteria, the final sample included 127 subjects. The results of the paired t-test showed a significant decrease in handgrip strength measured with a dynamometer, with values of 43.25±3.32 before work and 41.45±3.62 after work (p