Stand with your feet hip-distance apart, holding a TRX handle or ring in each hand, palms facing each other.
Walk your feet forward until your body is at a 45-degree angle to the floor, arms fully extended, and your body in one straight line. To make this harder, walk your feet further forward so your shoulders are even closer to the ground. The advanced version of this would be to have the body almost parallel to the floor.
Holding the core stable and the legs straight with either your feet or heels planted on the floor, bend your elbows behind you, keeping them close to the body, and pull the chest toward the hands.
Straighten the arms to lower the torso, completing one rep.
Keep going for 40 seconds, followed by a 20-second rest.