Break It Up: A Study Evaluating Breaking Up Daily Sedentary Behavior in Youth

Six daily 3 hour sessions with prompted 3-minute moderate-intensity walking bouts performed on a treadmill every 30 minutes throughout the 3 hour duration. There will be a total of 6 walking bouts (18 minutes total) each day. Moderate-intensity walking speed and grade will be selected to achieve 80% of the heart rate achieved at the ventilatory threshold as determined during a V02max test.

(Control 'intervention') Six daily 3 hour sessions with no physical activity (i.e. subject remains sedentary in seated or recumbent position) throughout the 3 hour duration.