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)gluteus maximus
B)popliteus
C)biceps femoris
D)gastrocnemius
E)iliopsoas

Question

Quizplus · Accepted Answer

The symptoms described, including pain at the back of the thigh, difficulty flexing the knee, and bruising, suggest an injury to the biceps femoris, which is part of the hamstring muscle group located at the back of the thigh.

An Olympic Sprinter Readies for a Race