Practice Dumbbell Squats first without any dumbbells, until your form is absolutely perfect and you feel comfortable with stability and range of motion.
Your feet should be placed approximately shoulder-width apart, with your toes positioned only slightly outward, facing in the same directions as your knees.
Focus on the majority of your body weight being distributed between your heel and your mid-foot. This positioning helps to reduce knee stress and allows you to maintain your balance by not leaning too far forward or backward.
Keep your eyes facing forward, maintaining a rigid back throughout the exercise. Do not bend too far forward or hunch forward with your shoulders.
Squat down as if you are straddling a bench − even do so initially. Do not squat lower than the point where the tops of your thighs are parallel to the ground.
Do not lock out your knees in the lifted position or even pause momentarily. There is too much leverage and therefore too much rest. Keep things moving.
Keep your head level − looking up arches your back and looking down hunches your shoulders. Always super slowly lower your body to the lowered position.
Lean-Back Squats:
Lean-Back Squats is easier than, yet similar to, Dumbbell Squats. Shifting your body backward also reduces the potential stress to the knee joint.
A fixed object that can easily support your body weight, and is easy to grasp tightly (bar, column, tree, etc.), should be used to facilitate this exercise.
In the lowered position, your feet should be shoulder-width apart, toes pointed out slightly, shins vertical, arms extended, and thighs parallel to the ground.
Your body weight should be distributed between your heel and your mid-foot, while maintaining the same relative head and back position mentioned above.
Do not pause in the lifted position or lock your knees at any time. Lift yourself up; then, go right back down − super slowly retuning to the lowered position.
As with every exercise, breathe out while lifting, and breathe normally when lowering. Don’t over-think the squatting motion − it’s just like sitting down.