Wall sits provide little to no aesthetic, performance, or health related benefits. Your knees take a lot of the pressure. There is no need to sit on a wall in every day life so why do it in your work out routine? Instead try goblet box squats.. Grab a low sitting stool and a dumbbell. With the dumbbell in hand squat until your butt touched the stool, hold that position without actually sitting for a few seconds then stand back up.