Feet too far forward
Keep feet only a few inches ahead of the bar so your shins and back stay in a natural position instead of leaning back into the bar.
Squat · Smith machine
The Smith machine squat runs the bar on fixed rails, removing balance so you can push your legs close to failure safely. Placing your feet slightly forward biases the quads; it suits beginners, solo lifters, and anyone chasing leg size.
The quads extend the knee and the glutes extend the hip. Feet under the bar make it closer to a free squat; feet slightly forward lets you sit back more and changes knee and hip demand, while deeper squats increase glute contribution.
Keep feet only a few inches ahead of the bar so your shins and back stay in a natural position instead of leaning back into the bar.
Always set the stops just below your lowest point so you can bail by simply sitting under the bar.
Reduce the load and use a full, consistent depth rather than chasing heavier partial reps.
Surpass starts the smith machine squat 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 up within a rep range like 6-12, then add 5-10 lb total once all sets hit the top. Bar weights vary between Smith machines, so compare your numbers only on the same machine.
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.
Not inherently. It loads the knees like any squat, and placing your feet slightly forward can make it feel easier on some people's knees. Problems usually come from loading too fast or forcing an awkward foot position.
The barbell squat trains balance, bracing, and a transferable skill; the Smith squat lets you isolate the legs and train close to failure more safely. Use whichever fits your goal, or both.