Reference no: EM133542721

Question

Think about open chain hip straight leg raise in the next situation: Sit on a treatment table with one knee extended and the other flexed for support and comfort. Perform a straight leg raise (hip flexion while knee is fully extended), assume the resistance is at the mid-tibia area and use this lower extremity to answer questions 12A - 12E. Maintain pelvic stabilization such that there is NO anterior or posterior tilting.

1. What muscles are acting at the knee?

2. Which one of the muscles from answer 12A above is generating tension at 2 joints and why?

3. What class of lever is being utilized at the hip joint?

4. Now only consider the act of hip flexion. While still SITTING with pelvis stabilized, how could you change this exercise such that each muscle from your answer in 'B' generated tension at only ONE joint? Briefly describe a starting position and a joint action.