As little as 20 seconds of brisk stair climbing, done several times a day, might be enough to increase aerobic fitness.
— Read on www.nytimes.com/2019/01/23/well/move/20-second-exercise-fitness-interval-training.html
As little as 20 seconds of brisk stair climbing, done several times a day, might be enough to increase aerobic fitness.
— Read on www.nytimes.com/2019/01/23/well/move/20-second-exercise-fitness-interval-training.html