Withdrawal of a tiny sample of muscle tissue. A hollow biopsy needle is inserted, through a small incision made with a scalpel, into the belly of a muscle. The needle with its sample of muscle is withdrawn and the muscle is weighed, cleaned of blood, mounted, and quickly frozen. It is then cut into thin sections, stained, and mounted for microscopical examination and biochemical analyses. The technique enables exercise physiologists to conduct studies of the microscopical structure and biochemistry of human muscle before, during, and after exercise.
Subjects: Sports and Exercise Medicine.