An Olympic sprinter readies for a race. After the sound of the starting gun, he propels himself forward from the starting block and immediately grimaces in pain, grabbing for the back of his thigh. Within 48 hours he begins noticing extensive bruising on the back of his thigh extending into the back of the knee. He now has difficulty rising from a seated position and flexing his knee. Bending at the waist generates more pain. Which muscle is likely injured?

a. Biceps femoris
b. Miopsoas opsoas
c. Gluteus maximus
d. Popliteus

An Olympic sprinter readies for a race. After the sound of the starting gun, he propels himself forward from the starting block and immediately grimaces in pain, grabbing for the back of his thigh. Within 48 hours he begins noticing extensive bruising on the back of his thigh extending into the back of the knee. He now has difficulty rising from a seated position and flexing his knee. Bending at the waist generates more pain. Which muscle is likely injured?

The correct answer is option A - Biceps femoris.

Explanation:

. One of the muscles of the hamstring compartment is the Biceps femoris. It is an essential muscle of the back thigh. Its injury is generally seen in sprinters. Its injury leads to the pain generally extending from the thigh region to the back of the knee and upwards to the fold of the buttocks.

Therefore, the correct answer is option A - Biceps femoris.