Motivation : 20 sec. on, 10 sec. off for 4 minutes (8 reps). Squats, push-ups, sit-ups…. 8 years ago 2.5k Views Share Share on PinterestShare on FacebookShare on Twitter Fitness and body Motivation Before and After Description 20 sec. on, 10 sec. off for 4 minutes (8 reps). Squats, push-ups, sit-ups. 19 shares
