Interval training’s stock has soared in recent years. Is it any wonder, when it promises to deliver impressive health and fitness perks in a shorter time frame than other workouts? Sessions can be fun ...

Researchers delved into muscles to figure out why intensive bursts of exercise are as effective as long term workouts ...

High-intensity interval training has surprising benefits for fitness and physical power, but don’t stay seated the rest of the day. By Gretchen Reynolds A mere four seconds of all-out exercise, ...