Hi, I'm Juliet Kaska and these are squat variations for weak knees. The squat is an excellent exercise to strengthen the entire lower half of your body. When you have strong glutes, hamstrings and hips you have a strong stable knee. The first one and one of my favorites is the Sumo squat. Stand with your feet hip width apart and then take another foot apart from one another so you are actually double hip width apart. Track the second toe and the knee in line with one another. Be careful not to rotate too far out, you will actually end up hurting your knee instead of improving its strength, bending down, come down as low as your thighs are in line with the knee and no further. On the exhale, draw the abs in and straighten the legs and return to standing. A second variation is a one legged squat. Bring both feet hip width apart, shift your weight onto your right leg, engaging the glute of the right leg, hinging at the hip and bending at the knee at the same time. Go forward until your chest is almost parallel with the ground. Dig down into your right heel and draw yourself all the way back up to standing and try not to left your left toes touch the ground. Repeat anywhere from 10 to 20 times on each leg.