Ackeem Emmons, head trainer at Clmbr, is a huge fan of the prisoner squat. "With hands interlocked behind the head, it allows you to increase your range of motion without sacrificing form," he says.
Instructions from Coach:
1. Start with your feet hip-width apart, toes pointing out slightly. Keep your chest up and place both hands on the back of your head, with your elbows pointing out to the sides.
2. Lower slowly by moving your hips down and back, keeping your back straight and looking forward, until your thighs are parallel to the ground. Then drive back up, pushing through your heels.
3. Aim to take three seconds to lower, pause at the bottom of the move, then take one or two seconds to return to standing. Aim for three sets of 12 reps.