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Muscle performance, work ability and physical functioning in middle-aged men.
Juhani Smolander1, Lars Sörensen, Mika Pekkonen
1ORTON Orthopaedic Hospital, Tenholantie 10, FIN-00280 Helsinki, Finland. juhani.smolander@orton.fi
Occupational Medicine (Oxford, England)
|August 25, 2009
Summary
Simple muscle performance tests showed weak associations with work ability and physical functioning in middle-aged men. These findings suggest limited utility for these tests in evaluating fitness for physically demanding jobs.
Area of Science:
- Occupational Health
- Musculoskeletal Physiology
- Workplace Ergonomics
Background:
- Limited research exists on the link between muscle performance and work ability in working adults.
- Understanding this relationship is crucial for assessing job fitness and preventing injuries.
Purpose of the Study:
- To investigate the correlation between basic muscle performance tests and self-reported work ability.
- To assess the relationship with physical functioning in middle-aged men.
Main Methods:
- Muscle performance was assessed using handgrip, sit-up, arch-up, squatting, and lifting tests.
- Work ability was measured using the Work Ability Index (WAI).
- Physical functioning and role limitations were evaluated using the RAND-36 health questionnaire.
Main Results:
- Muscle performance tests showed weak correlations with Work Ability Index (WAI) and physical functioning measures, explaining at most 10% of the variance.
- Dynamic lifting tests correlated moderately with WAI and physical functioning scores.
- Squatting test results showed a modest association with physical functioning.
Conclusions:
- The study did not find sufficient evidence to support the use of simple muscle performance tests for work-related fitness evaluations.
- Findings suggest these tests may have limited value for middle-aged men in physically demanding occupations.
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