The correct answer is medicare I think
The correct answer is Chronic Strain. Based on research and
medical experts Chronic Strains are commonly caused by overusing and
prolonged/repeated movements of the body’s muscles or tendons. Repetitive
movement of the muscles and tendons may result to pain, especially if the
movement is inappropriate and improper. With regards to the given situation,
the pitcher repeats elbow movements in order for him or her to pitch the ball,
which leads to the main factor of overusing the body’s muscle that may result
to chronic pain.
63% is all I could find but I hope this helps even though I couldn't find the exact number.