Low-Bar Squat
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Bar rests low across the posterior deltoids, forcing more forward lean and hip hinge than the high-bar back squat — shifting emphasis to the glutes, hamstrings, and adductor magnus, at some cost to knee-dominant quad (rectus femoris) involvement.
Detail
Low bar placement — called the "Power Back Squat" in the source, the low-bar squat in current terminology (see Bar Placement in the Squat (High / Low / Front)) — sets the bar across the posterior deltoids rather than on top of the trapezius (high-bar). This forces a greater forward torso lean and hip hinge, shifting the line of force toward the hips. The result is more posterior-chain loading (glutes, hamstrings, adductor magnus) and a shorter effective range of motion, which is why low-bar is generally favored in powerlifting for handling heavier loads. The vasti still extend the knee substantially, but rectus femoris — a 2-joint hip-flexor/knee-extensor — contributes less here than in the high-bar back squat, since its hip-flexor end is lengthened by the greater forward lean.
The general squat-safety rules still apply: do not lock out the knee, maintain proper spinal alignment (semi-isometric, "S" not "C"), squat to near-parallel, and understand the femur-vs-torso-length and knee-toe relationships (see Knee Safety in the Squat).
Key facts
- Bar placement: low, across the posterior deltoids (vs. high-bar on the traps).
- Primary: glutes, hamstrings (all three), vasti (three quads); Secondary: rectus femoris, adductor magnus.
- More forward lean and hip hinge than the high-bar back squat.
- Shorter effective ROM; generally preferred in powerlifting for heavier loads.
- Same squat-safety rules apply (no lock-out, spinal alignment, near-parallel depth).
Connections
- Bar Placement in the Squat (High / Low / Front) — high/low/front bar placement and the terminology note.
- Knee Safety in the Squat — general squat-safety rules.
- Quadriceps / Hamstrings / Gluteus Maximus — the muscles whose relative emphasis shifts with bar placement.
- Back Squats — the high-bar sibling.
- Front Squats — the bar-in-front sibling.
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Educational content only — not medical advice. Always consult a qualified professional for individualized guidance, especially around injury, pregnancy, or medical conditions.