Begin in the seated position on the forward part of the chair. Keep your back straight and place your feet in a wide stance, shoulder width apart.
Look at your knees and make sure they’re pointing the same direction as your feet. Your heels should be directly beneath your knees. This prevents your knees from extending beyond your feet which places additional stress on your knee joint.
Without using your hands (if possible), stand up, gain your balance, and slowly lower yourself back to sitting on the chair seat. This is one repetition.
Try to keep most of your bodyweight directly over your heels as you raise yourself up to the standing position. This maximizes your muscles’ contribution to the exercise and minimizes knee joint stress.