Isometric push-ups increase time under tension – and increase the challenge of the traditional move. Start at the top of a push-up position, then slowly lower down towards the floor. When you’re a couple inches from the ground, hold for 4 counts. Create tension throughout your body, grip the ground with your hands, drive your feet, squeeze your glutei and abs as hard as you can. Quickly press back up to start and repeat for 5 total reps. Take a look at the pic….!