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Push through your heels, not your toes.
Keep your knees tracking over your toes—don't let them cave inward.
Avoid overextending your lower back; the movement should come from your hips.
Keep your head and neck in a neutral position throughout the exercise.
Exhale as you lift, inhale as you lower.
Recommended sets and reps
Strength: 4–5 sets of 3–6 reps
Muscle growth: 3–4 sets of 8–12 reps
Endurance: 2–3 sets of 15–20 reps