5 reps each side · intermediate
The side kick series set-up (lying on the right side, head on the outstretched bottom arm). The top leg, held at hip height, pedals a big bicycle: it swings forward straight to about 70°, bends so the knee draws back past the hip with the heel toward the seat, reaches long behind the body, straightens and sweeps forward again. Then the other way round. The trunk stays still.
Bodyweight: no weights. Joint demand below is your own body's weight in this position.
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.
Femur changes keep standing height fixed by shortening or lengthening the torso. Longer femurs force more forward lean in any squat.
5 slow, controlled reps on each side. Pilates is practised for control, balance and mobility, never to failure, so this does not change with your limits.
Level: intermediate. One round counts like light conditioning work: 67 legs points, 41 core points.
Hip flexors (iliopsoas, rectus femoris), gluteus maximus, hamstrings, quadriceps, gluteus medius (holding the leg up), obliques and quadratus lumborum (holding the trunk still).
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.