What question did this study set out to answer?

This research aims to quantify how age, physical activity, and body composition affect maximal aerobic power in men aged 25-70 years.

Changes in aerobic power of men, ages 25???70 yr

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Randomized trial shows aerobic power declines with age in men, indicating lifestyle factors play a role.

This research aims to quantify how age, physical activity, and body composition affect maximal aerobic power in men aged 25-70 years.
Cross-sectional analysis of 1,499 healthy men aged 25-70 yrs.
Longitudinal sample of 156 men assessed over an average of 4.1 years.
Peak oxygen uptake measured via indirect calorimetry during maximal treadmill tests.
Cross-sectional decline in VO2peak was 0.46 ml.kg-1.min-1.yr-1, with SR-PA and %fat accounting for nearly 50% of this decline.
Linear regression showed age's impact on aerobic power reduced to -0.26 ml.kg-1.min-1.yr-1 when adjusted for lifestyle factors.
Longitudinal changes confirmed that increases in %fat and decreases in SR-PA influenced declines in aerobic power.

Jackson et al. (1995) studied this question.

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