Cossack Squat (Mobility Variant)

MobilityBW

Unloaded lateral squat shifting weight fully onto one bent leg while the other extends straight, opening the hips, groin, and ankles through a large range of motion. Used as mobility work rather than a strength movement here.

Demo: Squat University style mobility demo

Sets

2

Reps

6-8 per side

Rest

30s

Contraindications

Groin strain history — go slow and reduce range initially.

Setup

Stand with a wide stance, toes turned out slightly.

Execution

  1. 1Shift weight onto one leg, sitting the hips down and back over the bent knee
  2. 2Extend the opposite leg straight, foot flat or heel-up depending on ankle mobility
  3. 3Keep the chest tall and both feet in contact with the floor
  4. 4Shift smoothly side to side, pausing at the bottom of each rep

Key cues

  • Sit down and back into the working hip
  • Keep the straight leg's foot flat if possible
  • Chest stays tall, don't collapse forward
  • Drive through the whole foot on the bent-knee side

Common faults

  • Bent knee collapsing inward
  • Rounding forward instead of sitting back
  • Losing balance because of tight ankles — regress range
  • Bouncing instead of controlling the descent

Tweaks

  • Hold onto a support (rack, pole) to reduce balance demand
  • Elevate heels slightly on a wedge if ankle mobility limits depth
  • Add a pause of 2-3 seconds at the bottom of each side

Muscles

Primary: Adductors, Glutes, Hip Rotators

Secondary: Ankle Complex, Quads

Notes

Do unloaded here for mobility; add a goblet-held KB or DB later to make it a strength movement.

Sources

Attribution: Traditional folk-strength/mobility movement, adopted widely by Squat University and mobility coaches