Stand upBalanced over midfoot
Load 73% on the right
Side view
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Suitcase deadlift

One 32 kg kettlebell lifted from beside the right foot. The one-sided load pulls the body sideways; the load split between the feet shows it.

3°Ankle dorsiflexion
2°Knee flexion
5°Hip flexion
5°Trunk from vertical
9°Arm to trunk
0°Elbow flexion
30Ankle spacing, cm
57Hand spacing, cm
-3Knee outside ankle, cm
–Knee cave, ° inside toe line
27 / 73Load left / right, %
0Pelvis drop, cm

Load and joint demand

Load in the model: 32 kg. Balance and joint demand re-solve as you change it.

Lower back
28 / 229
Hip extensors
17 / 141
Knee extensors
25 / 50
Calves
40 / 40
Shoulder, per side
26 / 26
Elbow, per side
13 / 13

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
Abs and core
64 pts
Lower back
46 pts
Forearms and grip
35 pts

Effort and your quota

7.5/10 effort7.8fatigue per set

Your quota per set: 10 reps at 32.5 kg, stopping 2 reps short of failure.

One hard set earns 182 legs points, 18 arms points, 110 core points.

Prime movers

Gluteus maximus, quadriceps, obliques, quadratus lumborum, grip.

What to look for

  • Stay square; do not lean toward the bell.
  • Watch the load split in the readouts.
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.