Clean and pressCentre of mass inside base of support
Side view
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Clean and press

A 60 kg bar pulled from the floor and power-cleaned to the front of the shoulders, then pressed strictly overhead with straight legs. The classic whole-body barbell lift.

11°Ankle dorsiflexion
72°Knee flexion
130°Hip flexion
70°Trunk from vertical
68°Arm to trunk
0°Elbow flexion
30Ankle spacing, cm
56Hand spacing, cm
2Knee outside ankle, cm
0°Knee cave, ° inside toe line
50 / 50Load left / right, %
0Pelvis drop, cm

Load and joint demand

Load in the model: 60 kg. Balance and joint demand re-solve as you change it.

Lower back
366 / 366
Hip extensors
221 / 221
Knee extensors
5 / 53
Calves
50 / 50
Shoulder, per side
30 / 44
Elbow, per side
14 / 82

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

Glutes
100 pts
Quads
82 pts
Hamstrings
64 pts
Shoulders
46 pts
Upper back
35 pts
Triceps
35 pts

Effort and your quota

9.5/10 effort9.9fatigue per set

Your quota per set: 10 reps at 60 kg, stopping 2 reps short of failure.

One hard set earns 246 legs points, 81 push points, 35 pull points, 35 arms points.

Prime movers

Gluteus maximus, quadriceps, hamstrings, deltoids, trapezius, triceps.

What to look for

  • Clean it first; stand tall before the press.
  • Head back, press, head through.
  • Lower to the shoulders, then to the floor.
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.