Isometric arm strength and subjective rating of upper limb fatigue in two-handed carrying tasks.
Where this comes from
- Record sourced from PubMed, PMID 25794159.
- Also identified by DOI 10.1371/journal.pone.0119550 and PMC identifier 4368533.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Sustained carrying could result in muscular fatigue of the upper limb. Ten male and ten female subjects were recruited for measurements of isometric arm strength before and during carrying a load for a period of 4 minutes. Two levels of load of carrying were tested for each of the male and female subjects. Exponential function based predictive equations for the isometric arm strength were established. The mean absolute deviations of these models in predicting the isometric arm strength were in the range of 3.24 to 17.34 N. Regression analyses between the subjective ratings of upper limb fatigue and force change index (FCI) for the carrying were also performed. The results indicated that the subjective rating of muscular fatigue may be estimated by multiplying the FCI with a constant. The FCI may, therefore, be adopted as an index to assess muscular fatigue for two-handed carrying tasks.
Medical subject headings
- Isometric Contraction
- Muscle Fatigue
- Muscle Strength
- Upper Extremity