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Fitness self-perception and Vo2max in firefighters
W F Peate1, Linda Lundergan, Jerry J Johnson
1College of Public Health, Family and Community Medicine, University of Arizona, 1435 N. Fremont, Tucson, AZ 85719, USA. peate@u.arizona.edu
Journal of Occupational and Environmental Medicine
|June 28, 2002
Summary
Firefighter self-rated fitness does not correlate with actual aerobic capacity (maximum oxygen consumption [Vo2max]). Objective testing is crucial for ensuring firefighters possess the necessary fitness for duty and to prevent cardiac events.
Area of Science:
- Occupational Health
- Exercise Physiology
- Cardiovascular Health
Background:
- Firefighting demands maximal exertion, requiring adequate aerobic capacity (maximum oxygen consumption [Vo2max]) for performance and cardioprotection.
- Inactive firefighters face a significantly higher risk (90%) of myocardial infarction compared to their aerobically fit counterparts.
- Maintaining high aerobic fitness is essential for mitigating health risks and ensuring job readiness in firefighters.
Purpose of the Study:
- To investigate the relationship between firefighters' self-perceived fitness levels and their objectively measured aerobic capacity.
- To determine if subjective fitness ratings accurately reflect physiological capacity in a firefighting cohort.
- To highlight the importance of objective fitness assessment for this high-exertion profession.
Main Methods:
- 101 firefighters participated, completing a self-assessment questionnaire on perceived fitness levels (0-7 scale).
- Objective aerobic capacity was measured using two standardized tests: a 5-minute step test and a submaximal treadmill test.
- Data analysis focused on correlating self-reported fitness rankings with the results from the Vo2max assessments.
Main Results:
- No statistically significant association was found between firefighters' self-perception of fitness and their measured Vo2max via either the step test or treadmill test.
- Subjective fitness ratings did not accurately predict objective aerobic capacity in the study population.
- This suggests a disconnect between how firefighters perceive their fitness and their actual physiological capabilities.
Conclusions:
- Self-assessment of fitness is an unreliable indicator of aerobic capacity in firefighters.
- Given the critical demands and health risks, periodic objective aerobic capacity testing is recommended for all active-duty firefighters.
- Individualized exercise prescriptions and supportive interventions are advised to optimize firefighter health and performance.