Match each description with the correct injury that can occur from running.

a. known as runner's knee, this is a condition characterized by knee pain ranging from severe to mild discomfort. it occurs when the back of the kneecap rubs the thigh bone.

b. a torn muscle occurs when the muscle is pulled apart from the achilles tendon. severe pain is often felt by the victim and is often, but not always, accompanied by a "pop" sound.

c. this occurs when the tendon found at the back of the ankle becomes irritated. the most common symptoms are pain and swelling around the affected tendon. the pain is typically worst at the start of exercise and decreases thereafter.

d. this is a disorder of the connective tissue that supports the arch of the foot. it results in pain in the heel and bottom of the foot that is usually most severe with the first steps of the day or following a period of rest.

e. these are pains along the inner edge of the tibia. they are caused by repeated trauma to the connective muscle tissue around the tibia. this is the most common lower leg injury among runners.

1. achilles tendinitis

2. calf injuries

3. plantar fasciitis

4. patellofemoral pain syndrome

5. shin splints