Shoulder taps require zero equipment and can be done anywhere.
Set up in the push up position with your hands shoulder width apart positioned directly under your shoulders (avoid reaching too far out in front of you)
Keep your hips up and in line with your spine. (don’t let your hips sag down and don’t hike them up in the air) - this is where core work comes in!
Try to limit your hip movement as you alternate tapping your shoulders
Start out 3 sets of 10 taps to each side with a minute rest between sets