The study found that in some coronary heart disease patients — those of normal weight — weight loss actually increased the risk for death.

Nicholas Bakalar, The New York Times:

Lowering body mass index by more than 0.10 in a year was associated with a 30 percent increase in the risk for death, but only in those of normal weight at the start. Weight gain was not associated with mortality.

Compared to patients who were inactive, those who did 150 minutes of moderate exercise a week reduced their risk by 19 percent. Those who exercised more than that had a 36 percent reduction in mortality.