Hips lifting off the seat
Stop the descent just before your lower back starts to round off the pad.
Squat · Leg press
The leg press is a machine exercise where you push a weighted sled away with your feet while seated or reclined. It trains quads and glutes heavily with less balance and back demand than squats, making it great for volume and all levels.
The quads extend the knees and the glutes extend the hips. Higher, wider foot placement shifts emphasis toward glutes and adductors; lower, narrower placement biases the quads.
Stop the descent just before your lower back starts to round off the pad.
Use a load you can take through a full range, at least to about 90 degrees of knee bend.
Finish with a slight bend or a controlled lockout rather than slamming into it.
Surpass starts the leg press at 8–12 reps with about 1.5 reps in reserve. As a compound lift it usually belongs early in the session, when you are fresh.
Work in 8-15 reps and add a plate per side when every set hits the top of the range with full depth. It works well after squats or as a primary quad lift if squats aren't an option.
Surpass shows what you lifted last time beside a target for this set, and adjusts it from your reps and RIR. Free on iPhone, no account needed.
These train the same main muscles. Swap when the equipment is busy, something hurts, or progress has stalled for several weeks.
For building leg muscle, the leg press can be very effective. Squats train more balance and trunk strength, so they carry over better to free-weight strength.
Mid-platform at shoulder width is a good default. Higher placement brings in more glutes; lower placement emphasizes the quads but demands more knee and ankle range.