Adherence

Physical inactivity (defined as <3.5 hours of moderate-to-vigorous activity per week) is a strong, independent predictor of mortality, increasing risk even in lean women.

Being thin is not enough. If you are lean but sedentary, your risk of death is 55% higher than if you were lean and active. You must maintain regular physical activity (at least 3.5 hours/week of moderate-to-vigorous exercise) to minimize mortality risk, regardless of your body weight.