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Unadjusted linear, cubic, and quadratic regression plots of cumulative sedentary time, light-intensity physical activity, and moderate-to-vigorous-intensity physical activity (min/day) from ages 11 to 24 years with progressive increase in left ventricular mass (g/m2.7) from ages 17 to 24 years. Linear regression is solid line, quadratic regression is short dash line, and cubic regression is long dash line.
