In forward support phase, the maximum allowed forward lean of the trunk is what?

In forward support phase, the maximum allowed forward lean of the trunk is what?

• A. Less than 5 degrees
• B. 0 degrees
• C. 10 degrees
• D. 20 degrees

Answer: (A)

During forward support, keeping the trunk nearly upright is important because it affects how your weight shifts over the stance leg. The maximum forward lean should be very small—less than about 5 degrees. This tiny lean helps align your center of mass with the foot in contact, minimizing braking forces and allowing the leg to propel you forward efficiently. If you lean more than a few degrees, the trunk moves ahead of the foot too much, increasing braking and making it harder to transition into a powerful push-off. Being near vertical, with only a small forward tilt, supports a smoother transfer of energy into forward propulsion while maintaining balance and sequence in the sprint mechanics.

During forward support, keeping the trunk nearly upright is important because it affects how your weight shifts over the stance leg. The maximum forward lean should be very small—less than about 5 degrees. This tiny lean helps align your center of mass with the foot in contact, minimizing braking forces and allowing the leg to propel you forward efficiently.

If you lean more than a few degrees, the trunk moves ahead of the foot too much, increasing braking and making it harder to transition into a powerful push-off. Being near vertical, with only a small forward tilt, supports a smoother transfer of energy into forward propulsion while maintaining balance and sequence in the sprint mechanics.