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Movement Family
Squat.
The king of lower-body strength.
A bilateral knee-and-hip dominant pattern that loads the quadriceps, glutes, and adductors while the entire posterior chain stabilizes the spine. Every squat variation is a controlled descent into hip and knee flexion, then a powerful concentric drive back to standing.
Pattern
Knee Dominant / Squat
Joint Action
Hip & Knee Flexion → Extension
Plane
Sagittal
Axis
Mediolateral
1090 variations indexed·29 equipment types
Featured Coach
Alex
Strength & Conditioning
3-PLANE
Dr. Atlas
Biomechanics
Anatomy
The Archetype Muscle Map
Every variation in this family follows the same muscle role pattern. Equipment and angle change the emphasis — not the architecture.
Target
Quadriceps
Synergist
Gluteus MaximusAdductor MagnusSoleus
Stretch
Hip FlexorsTibialis Anterior
Stabilizer
Erector SpinaeTransverse AbdominisObliquesGluteus Medius
Muscle Role Color System
Target
Primary mover doing the most work in the exercise.
Synergist
Assisting muscles that support the primary mover.
Stretch
Muscles loaded eccentrically — actively lengthening.
Stabilizer
Bracing & joint-stabilizing muscles holding posture.
Training Outcomes
Why train the Squat?
Hypertrophy
Maximal quadriceps and glute mass under deep ranges of motion.
Strength
Foundational compound lift — strongest expression of bilateral leg power.
Function
Core pattern for sitting, standing, jumping, and landing safely under load.
Coaching · Form Diagnostics
Common Mistakes Across Every Variation
These three errors show up in barbell, dumbbell, machine, and bodyweight variants alike. Fix them once — the rest of the family follows.
Mistake
Knee valgus (knees collapsing inward).
Correction
Drive knees out in line with toes; cue the glute medius to fire on descent.
Mistake
Butt wink — lumbar flexion at the bottom.
Correction
Stop at the depth where neutral spine ends; rebuild ankle and hip mobility first.
Mistake
Forward chest collapse from weak bracing.
Correction
Brace 360° before unracking; keep ribs stacked over pelvis.
Variations
Every Squat in the library
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Related Movement Families
Patterns that share architecture, complement load distribution, or pair well in programming.