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Reasons for being physically active in middle age and longitudinal associations between physical activity and physical capacity

The aim was to investigate self‐reported reasons for being leisure‐time physically active (LTPA) at ages 34 and 52 and explore associations between LTPA at age 52 and physical activity, physical capacity, and health earlier in life. Cohort participants answered questions about physical activity and health and performed tests of physical capacity at ages 16, 34, and 52. The most frequently reported reasons for being LTPA or not at ages 34 and 52 were similar. Participants enjoyed being active and health benefits related to physical activity was important. Common barriers were other priorities, disability, and feeling too tired. A significantly higher percentage of those who were LTPA at the ages of 34 and 52 rated their general health to be good when compared to those who were not physically active. Analyses showed that higher muscle strength and endurance at the age of 34 could positively predict LTPA at 52. At ages 34 and 52, the cohort members presented with similar reasons for, and similar barriers to physical activity. Those who were LTPA rated their health better, and there was a significant association between physical capacity at the age of 34 and future physical activity.