Fig. 1.

This figure is based on accelerometer data from the U.S. National Health and Nutrition Examination Survey, which shows how 1367 older, overweight adults (mean age = 70.5 years; mean body mass index = 29.7 kg/m²) allocate their time on average throughout the day [9]. Most research on physical activity and brain health focuses on MVPA. However, only a very small proportion of the day is spent in MVPA. Emerging evidence suggests that replacing time spent in sedentary behavior with light-intensity physical activity can improve glycemic control. However, little is known about the implications of this for brain health. Abbreviation: MVPA, moderate to vigorous intensity physical activity.