11.Achilles Tendon
This thick, ropey tendon runs down the back of your leg and attaches your calf muscle to the heel bone. When inflamed, you’ll have pain at the back of the leg, 2 to 4 inches above the heel. It causes 15% of all running injuries, sometimes because of the wrong shoes or problems with your form. But doing a lot of running or jumping of any sort can do it, as well as inflammatory diseases like arthritis.
12.Jumper’s Knee
It’s the most common type of tendinosis in the knee. It inflames either the patellar tendon at the lower edge of the kneecap or the quadriceps tendon at the upper edge. It usually happens when you use them too much, and is typical in basketball players and distance runners that train a lot.
