S.Wray is using an Iron Woody Monster Band to add a extreme resistance to his squats. This is a very deceiving exercise. He must keep his elbows up and his chest & shoulders tight. This keeps the band in place and also makes it an isometric upper body hold. You must think of the body as ONE UNIT!
If you try this exercise, choose a band that is right for you. Women should start with red/blue bands and graduate to green. Men should start with blue/green and graduate to black. And for you monsters out there...choose the MONSTER band. Remember to keep your elbows up and shoulders tight to hold the band in place. Sit back on those heels (pretend you are sitting back in a chair). Squat down (forming an L with your legs). Don't stop
and keep squatting! PUSH!