In elite sprinters, the rear hip angle at the start is which angle?

• A. 70 degrees
• B. 80 degrees
• C. 90 degrees
• D. 100 degrees

Answer: (B)

The main idea is the position of the rear hip when starting from blocks and how that position sets up immediate, powerful hip drive. In elite sprinters, the rear hip sits in about an 80-degree angle between the torso and the thigh. This mid-range flexion places the hip in a favorable spot to pre-stretch the hip extensors (glutes and hamstrings) just enough so they can fire into a rapid, forceful hip extension as the blocks release. That quick extension directs a strong horizontal impulse into the track, helping a fast, explosive start.

If the hip were more flexed (a smaller angle), the lever becomes less favorable for immediate powerful drive and can limit how quickly you can push off. If the hip were more extended (a larger angle, closer to 90–100 degrees), you lose some of that advantageous pre-stretch and the ability to produce maximal horizontal force right at takeoff. So around 80 degrees hits a practical balance for an explosive start.