Dead bug

Instructions

Lie on your back on the floor, arms stretched out to the sky and legs raised so that your knees form a 90-degree angle and your calves are parallel to the ground. This is the starting position.
Unfold the left leg until it is stretched and parallel to the floor (without touching it) and, at the same time, put the right arm back until it is also parallel to the floor.
Hold this position for one second then return to the starting position.
Repeat with the other arm and the other leg.

Muscles