The achilles is the tendon formed as the gastrocnemius and soleus – the calf muscles – join to insert on to the heel bone. The achilles tendon has to tolerate the highest loads in the body – up to 10 times your body weight during running, jumping, hopping and skipping.
Patellar tendonitis is a common injury or inflammation of the tendon that connects your kneecap (patella) to your shinbone (tibia). Your pain may be mild or severe. Anyone can get patellar tendonitis. But it’s such a frequent injury of athletes, especially those who play volleyball and basketball, that it’s called jumper’s knee.
Posterior tibial tendon dysfunction (PTTD) is a condition caused by changes in the tendon, impairing its ability to support the arch. This results in flattening of the foot. PTTD is often called adult acquired flatfoot because it is the most common type of flatfoot developed during adulthood.
Rotator cuff tendinitis, or tendonitis, affects the tendons and muscles that help move your shoulder joint. If you have tendinitis, it means that your tendons are inflamed or irritated. Rotator cuff tendinitis is also called impingement syndrome. This condition usually occurs over time.
Rarely, tendonitis is caused by an infection, such as gonorrhea. Tendonitis is most common in the shoulder, elbow, knee, wrist and heel, although it can happen anywhere that tendons are found in the body. For uncertain reasons, tendonitis is also common in people with diabetes.