Sweep acrossBalanced over midfoot
Side view
Drag to orbit, pinch or scroll to zoom

Landmine rotation

Standing, arms long, holding the free end of a landmine anchored 1.9 m ahead. The end sweeps in an arc from beside one hip, up past the chest, to beside the other, with the trunk braced against the turn; about 15 kg is felt at the hands.

1°Ankle dorsiflexion
2°Knee flexion
2°Hip flexion
0°Trunk from vertical
55°Arm to trunk
2°Elbow flexion
36Ankle spacing, cm
9Hand spacing, cm
-1Knee outside ankle, cm
–Knee cave, ° inside toe line
50 / 50Load left / right, %
2Pelvis drop, cm

Load and joint demand

Load in the model: 15 kg. Balance and joint demand re-solve as you change it.

Lower back
61 / 65
Hip extensors
31 / 33
Knee flexors
29 / 31
Calves
34 / 34
Shoulder, per side
60 / 89
Elbow, per side
51 / 52

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

Abs and core
100 pts
Shoulders
64 pts
Glutes
46 pts

Effort and your quota

3.5/10 effort3.7fatigue per set

Your quota per set: 10 reps at 15 kg, stopping 2 reps short of failure.

One hard set earns 46 legs points, 64 push points, 100 core points.

Prime movers

Obliques, rectus abdominis, anterior deltoid, gluteus medius.

What to look for

  • Arms long; the turn comes from the hips and trunk.
  • Pivot the back foot as the bar crosses.
  • Control the bar down to each hip.
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.