The leg press lets you load your quads and glutes heavily with the back supported — a joint-friendly way to build lower-body size.
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Get FormTwin — free on the App StoreThe leg press works mainly the quads, with the glutes and adductors assisting. A higher foot position shifts more work to the glutes and hamstrings; a lower position emphasises the quads.
The leg press builds the quads and glutes well and is easier to learn and load safely, but it trains less core and stabiliser work than the squat. Many people use both.
Usually it's too much weight through a short range, or knees caving in. Lighten the load, control the descent, and keep your knees tracking over your toes.
This guide is general fitness information, not medical advice. Muscle involvement varies with form, grip and individual anatomy. Consult a professional before starting a new program.