Parivrtta Malasana
hold 20 s each side · intermediate · move in slowly, hold, come out the same way
Take care: Sit on the block if the knees or hips complain; twist gently with a sensitive lower back, and skip it with a knee that will not bend this far.
Parivrtta Malasana (squat twist), on a tall block under the seat. From garland (feet a little wider than the hips, toes out, a deep squat with the heels down), the palms press together at the heart and the trunk turns to the right until the left upper arm comes to the outside of the right knee. The pelvis height is solved for the knees and the hips over the feet.
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.
Hold for 20 seconds on each side: move into the pose slowly, breathe steadily, and come out the way you went in. Yoga 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: 38 legs points, 47 core points.
Obliques and spinal rotators, adductors and gluteus maximus (stretched), calves (stretched), quadriceps, spinal erectors.
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.