Shift downCentre of mass inside base of support
Side view
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Cossack squat

Very wide stance; the pelvis travels sideways and down over the right foot while the left leg straightens out to the side. Balance is checked against the whole base.

-6°Ankle dorsiflexion
5°Knee flexion
26°Hip flexion
5°Trunk from vertical
20°Arm to trunk
111°Elbow flexion
90Ankle spacing, cm
10Hand spacing, cm
-18Knee outside ankle, cm
–Knee cave, ° inside toe line
51 / 49Load left / right, %
0Pelvis drop, cm

Load and joint demand

Bodyweight exercise: the load slider has no effect here; body mass comes from your limits.

Lower back
22 / 72
Hip extensors
13 / 46
Knee extensors
12 / 54
Calves
24 / 25

N·m now / peak over the rep.

Faults

Faults grow with knee bend and apply to lifts standing on the floor. The fault check flags a knee caving more than 10° inside the line of the toes and a load split beyond 60/40. Knee cave shows best in the front camera.

Body

Femur changes keep standing height fixed by shortening or lengthening the torso. Longer femurs force more forward lean in any squat.

Muscles worked

Adductors
100 pts
Quads
82 pts
Glutes
64 pts

Effort and your quota

6.5/10 effort6.5fatigue per set

Your quota per set: 8 reps at bodyweight, stopping 2 reps short of failure.

One hard set earns 246 legs points.

Prime movers

Adductors, quadriceps, gluteus maximus.

What to look for

  • The straight leg stretches the inner thigh; heel of the working foot stays down.
  • Hands forward help counterbalance; the front camera shows the sideways path.
How the model works, and its limits

One 3D skeleton drives both views. Segment lengths and widths are Winter's anthropometric ratios of height; segment masses and centre-of-mass positions follow Dempster's data. For free-standing lifts the whole-body angle is found numerically so the combined centre of mass of lifter and load sits over the middle of the foot. Arms and legs use two-link inverse kinematics with a pole direction. Rep timing follows a minimum-jerk profile.

Balance is quasi-static, so ballistic lifts are shown slowed down. Cable pull and pad support forces are not modelled. The spine is one rigid segment and joints have no range-of-motion limits or muscle forces.