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

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Date
2026
Authors
Ramba, Yonathan
Kapoor, Gaurav
Hendrik, Hendrik
Arpandjam’an
Journal Title
Journal ISSN
Volume Title
Publisher
Servicio de Publicaciones. Universidad de Murcia
Abstract
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<0.05). Similarly, blood plasma lactic acid levels showed a significant increase, from 2.93±0.29 before work to 3.67±0.57 after 4 hours of typing (p<0.05). These results indicate a relationship between handgrip strength and lactic acid levels, supporting their use as indicators of arm muscle fatigue in computer operators.
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Keywords
Hand Dynamometer , Blood Plasma Lactic Acid Level , Muscle Fatigue
Citation
SPORT TK. Year 2026. Volume 15. Article 1.
URI
http://hdl.handle.net/10201/213342
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Sport TK Vol.15 (2026)
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