During the stride phase, which description best fits the right posterior gluteus medius and right inferior gluteus maximus in these pitching patterns?

• A. There is increased activation of both muscles.
• B. There is delayed or insufficient activity of the right posterior gluteus medius and right inferior gluteus maximus.
• C. There is excessive activation leading to increased stride length.
• D. There is no change in their activity.

Answer: (B)