Motivation : 20 sec. on, 10 sec. off for 4 minutes (8 reps). Squats, push-ups, sit-ups…. August 20, 2017, 12:33 am 2.5k Views 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
