Table 8. Knee positions and ROM values for variable ball height.. Knee Quantity (degrees) Mid-Thigh (degrees) Mid-Waist (degrees) Mid-Torso (degrees) Rear Knee Position Setting Phase 48 32 26 Rear Knee ROM Setting Phase 5 (flexion) 7 (flexion) 7 (flexion) Rear Knee Position Swing Phase 53 39 33 Rear Knee ROM Swing Phase 25 (flexion) 29 (flexion) 27 (flexion) Front Knee Position Swing Phase 69 58 52 Front Knee ROM Swing Phase 34(extension) 38 (extension) 35 (extension)