Slam
Side view
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Battle rope slams

Both rope ends lifted overhead together, then slammed down to the floor as the hips drop into a half squat. Shown with the ropes running to an anchor about 3 m away.

1°Ankle dorsiflexion
2°Knee flexion
12°Hip flexion
2°Trunk from vertical
140°Arm to trunk
74°Elbow flexion
52Ankle spacing, cm
44Hand spacing, cm
-9Knee 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

Lats
100 pts
Abs and core
82 pts
Shoulders
64 pts
Glutes
46 pts
Quads
35 pts

Effort and your quota

6.5/10 effort6.5fatigue per set

Your quota per set: 30 s hard, stopping 2 reps short of failure.

One hard set earns 81 legs points, 64 push points, 100 pull points, 82 core points.

Prime movers

Latissimus dorsi, abdominals, deltoids, gluteus maximus, quadriceps.

What to look for

  • Reach tall, then throw the whole body into the slam.
  • Hips drop as the arms come down.
  • Keep the back flat at the bottom.
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.