The back squat as the foundation of lower-body strength

Squatting to depth under a barbell trains more muscle mass simultaneously than any other lower-body movement.

Why it works

The back squat recruits the entire posterior chain (glutes, hamstrings, spinal erectors) and the quadriceps in a coordinated, multi-joint pattern that mirrors how the body generates force in most athletic and daily activities. The load on the spine and hips also creates a systemic hormonal signal — including transient growth hormone and testosterone spikes — that isolation exercises cannot replicate.

How to do it

1. Set the bar across the upper back (low-bar: below the traps; high-bar: on the traps) — low-bar engages more hip musculature.
2. Stand with feet just outside hip width, toes turned slightly out to allow the hips to track over the feet.
3. Descend by pushing your knees out and sitting into the hips until the crease of the hip is below the top of the knee.
4. Drive the floor away, maintaining a neutral spine — do not let the chest drop or the knees cave.
5. Add weight only when the previous load was completed with consistent form across all sets.

Evidence

The squat is one of the most studied exercises in sports science. Multi-joint lower-body compound exercises consistently produce greater strength and hypertrophy in untrained and intermediate populations than isolation alternatives when volume is matched. (observational)

Direct RCTs comparing the squat specifically to isolation exercises are limited; the superiority argument rests on mechanistic grounds and practitioner consensus.

Sources

• Schoenfeld (2010), "The mechanisms of muscle hypertrophy," Journal of Strength and Conditioning Research

Common mistake

Stopping the descent above parallel, which unloads the glutes and posterior chain and trains only the top third of the movement — the easiest, least adaptive portion.