LAUSR

Key Points Question Is the amount of time spent in moderate to vigorous–intensity and light-intensity physical activity throughout adolescence associated with a clinical marker of hip strength in young adult men and women? Findings In this cohort study of 2569 young people who received repeated accelerometer assessments beginning at age 12 years, more time spent in moderate to vigorous–intensity physical activity in adolescence was associated with greater hip bone mineral density at age 25 years, whereas more time spent in light-intensity physical activity was not associated with bone mineral density at age 25 years. Meaning The findings indicate that higher-intensity physical activity in early life may be important for maximizing peak adult hip strength and protecting against osteoporosis in later life.