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Health limits activities: Standardized genetic and environmental variance components over time, by sex; best-fitting model showing linear and quadratic means moderation, linear and quadratic variance moderation, no equating sexes.
Note. “A” represents genetic variance, “C” represents shared environmental variance, and “E” represents non-shared environmental variance. Age is shown on the x axis, and standardized variance is shown on the y axis. ACT = activity.
