Preclinical and observational studies suggest that exercise may improve cancer outcomes. However, definitive level 1 evidence is lacking. In this phase 3, randomized trial conducted at 55 centers, we ...

Nighttime sleep and physical activity in the 3 h before sleep onset were assessed using Polar devices (models A370, M430, M600, Vantage V, and Vantage M). These wrist-worn devices all use validated ...