Physical fitness does not reflect physical activity patterns in middle-aged workers

Area of Science:

• Occupational Health
• Exercise Physiology
• Public Health

Background:

• Assessing physical activity and fitness is crucial for understanding worker health.
• Middle-aged populations often exhibit sedentary behaviors impacting long-term health outcomes.
• Cross-cultural comparisons can reveal differences in lifestyle and fitness levels.

Purpose of the Study:

• To evaluate the relationship between occupational and leisure physical activity and physical fitness in Belgian and Slovakian middle-aged workers.
• To compare physical fitness levels between workers from different countries with potentially different activity patterns.
• To determine the extent to which physical activity explains variations in physical fitness.

Main Methods:

• A prospective study involving 2,565 healthy, middle-aged workers from Belgium and Slovakia.
• Utilized questionnaires to assess occupational and leisure time physical activity.
• Employed a sub-maximal exercise test to measure physical fitness, defined as workload at a heart rate of 150 beats per minute, standardized for body weight.

Main Results:

• Less than 5% of participants engaged in strenuous work (energy expenditure > 31.5 kJ/min).
• A significant portion of participants reported minimal heavy leisure time activity (33% of Belgians, 50% of Slovaks).
• Slovakian workers demonstrated significantly higher physical fitness compared to Belgian workers (P < 0.001).
• While occupational activity (Belgians) and leisure activity (Slovaks) showed independent associations with fitness, they explained less than 1% of the fitness variance.
• Physical fitness levels were found to be largely independent of usual physical activity patterns in this cohort.

Conclusions:

• The study suggests that in this cohort of predominantly sedentary, middle-aged workers, physical fitness is not strongly correlated with their typical occupational or leisure physical activity levels.
• Differences in fitness between Belgian and Slovakian workers warrant further investigation into other contributing factors beyond reported physical activity.
• These findings highlight the need for targeted interventions to improve physical fitness and mitigate health risks associated with sedentary lifestyles in middle-aged workers.