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Muscles More Challenged in Deeper Squats
Glutes (Maximus, Medius, Minimus)
Why? Deeper squats stretch the glutes more at the bottom, creating a stronger eccentric load and greater activation during the concentric (upward) phase.
Hamstrings
Why? Increased hip flexion at the bottom of a deep squat stretches the hamstrings, requiring more force to extend the hips upward.
Adductors (Inner Thighs)
Why? The wider knee angle in deep squats (especially with a wider stance) engages the adductors to stabilize the hips and knees.
Quadriceps (Vastus Lateralis, Rectus Femoris)
Why? While quads are active in all squats, deeper squats demand more knee flexion, increasing quad recruitment—especially in the hole (bottom position).
Core (Transverse Abdominis, Obliques, Erector Spinae)
Why? Maintaining an upright torso in deep squats requires greater core bracing to prevent spinal flexion under load.