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Squat thrust

From standing: squat and put the hands down, jump the feet back to a straight plank, jump them back in beside the hands and stand up. A burpee without the push-up or the jump.

4°Ankle dorsiflexion
2°Knee flexion
3°Hip flexion
4°Trunk from vertical
19°Arm to trunk
2°Elbow flexion
22Ankle spacing, cm
58Hand spacing, cm
-1Knee outside ankle, cm
–Knee cave, ° inside toe line
–Load left / right, %
0Pelvis drop, cm

Load and joint demand

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

No gravity-based joint demand to show for this exercise.

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

Quads
100 pts
Glutes
82 pts
Abs and core
64 pts
Shoulders
17 pts

Effort and your quota

6.5/10 effort6.5fatigue per set

Your quota per set: 13 reps at bodyweight, stopping 2 reps short of failure.

One hard set earns 182 legs points, 17 push points, 64 core points.

Prime movers

Quadriceps, gluteus maximus, hip flexors, abdominals, deltoids (holding).

What to look for

  • Hands flat on the floor, just in front of the feet.
  • Land in a straight plank; don't let the hips sag.
  • Jump the feet back in and stand all the way up.
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.