BMJ

Quantifying the relative intensity of free-living physical activity: differences across age, association with mortality and clinical interpretation—an observational study

Objectives To describe age-related differences in the absolute and relative intensity of physical activity (PA) and associations with mortality. Methods UK Biobank participants with ...
The Conversation

Heart rate zones aren’t a perfect measure of exercise intensity, but regularly getting your heart pumping is still important for fitness

Regardless of the intensity of exercise you prefer, keeping a consistent routine can keep your heart healthy. Klaus Vedfelt/DigitalVision via Getty Images Aerobic exercise like jogging, biking, ...