Back squat

Bar over mid-foot, brace before descent, knees track over toes.

family=squatpattern=squatforce=pushmechanic=compoundequipment=free_weight

Muscles

muscle emphasis · training guidance

quadsPRIME
glutes68
hamstrings56
Primary
quads
Supporting
glutes, hamstrings

Mechanics

Pattern
squat
Equipment
barbell, rack
Geometry
90° Alignment
Target feel
Quads and glutes drive evenly out of the bottom.
Progression
Progress only when depth and brace match across all sets.
Regression
Use leg press or goblet squat if back position breaks.

Watch for

  • Losing brace at depth
  • Hips shooting up first

Equipment context

The barbell version lets you move the most absolute load, while your grip and shoulder girdle stabilize the path.

Substitutions

Progression ladder

  1. Beginner / regression: Use leg press or goblet squat if back position breaks.
  2. Standard: Back squat
  3. Advanced / progression: Progress only when depth and brace match across all sets.

Atlas metrics

Movement pattern
squat
Primary target
quads
Supporting muscles
glutes, hamstrings
Equipment
barbell, rack
Joint geometry
90° Alignment
Alternatives
3 substitutions

Evidence & limits

Last reviewed against peer-reviewed biomechanics references. Exercise descriptions are framed as training guidance, not medical advice.

Source: ExRx.net Exercise & Muscle Directory

Eccentryx is fitness software. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease, injury, or medical condition. Consult a licensed physician before beginning any exercise program.

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FAQ

How do I set up Back squat?
Bar over mid-foot, brace before descent, knees track over toes.
What should I feel during Back squat?
Quads and glutes drive evenly out of the bottom.
What are common mistakes with Back squat?
Losing brace at depth; Hips shooting up first
How do I progress Back squat?
Progress only when depth and brace match across all sets.
What can I do instead of Back squat?
Front squat, Hack squat, Leg press
Back squat anatomy diagram.
The movement · Hip 172°→80° · Ankle 90°→128°
FeFg170→148° Knee172→80° Hip90→128° Ankle

Back squat: squat pattern, 2600 ms rep trace, engine-derived.

Train Back squat in Gym Mode → Browse the public Atlas →