The king of leg builders. Nothing grows wheels like this.
Keep your chest up and knees tracking over your toes, don't let them cave in.
The barbell back squat loads your whole lower half through the biggest range of any leg lift, with the quads driving you out of the hole and the glutes powering your hips through to lockout. Because the bar sits across your upper traps, every rep also demands a braced trunk and a stable spine, which is why squat strength shows up everywhere else. If you only had one lower-body lift, this would be it.
Past parallel, so your hip crease drops below your knee, as long as your heels stay down and your back stays neutral. Depth you can control beats depth you fall into.
Usually the glutes checking out under load. Lighten the bar, screw your feet into the floor, and push your knees out over your toes on every rep until it's automatic.
High bar, resting on the upper traps, keeps you more upright and biases the quads, and it's what these steps describe. Low bar is a powerlifting tool, so unless you're chasing a total, high bar is the default.
