Experiencing pain behind your knee while running can be a symptom of a more serious problem, such as tendinitis or a Baker’s cyst. If you feel such pain, immediately stop running to prevent further injury. Treatment includes ice, compression and elevation of your knee. Contact your doctor if pain persists.

Weight loss, according to the American Council on Exercise, can significantly improve your health by lowering your risk of heart disease, diabetes and stroke. Additionally, the loss of a few pounds can improve your appearance, boosting your self esteem.

Whether it's "runner's knee", arthritis or iliotibial band syndrome, pain in and around your knee cap can slow you down. The patella, or knee cap, sits over the femur and tibia and all three bones are connected by cartilage, ligaments and tendons, any one of which can be compromised by natural causes or overuse.

When you're all caught up in your tennis match, nothing else matters but the thrill of competition. When you race across your end of the court to thwack the ball over the net, all you're interested in is the look on your opponent's face when you score a point. What you don't notice until after the game is knee pain.

Acne sufferers will go to great lengths to solve their skin problems, but sometimes a simple solution is all you need. A nightly hot compress, for example, might be enough to improve your complexion, though you should discuss your skin problems with a dermatologist before attempting to treat them yourself.

Lunges and squats are great exercises for strengthening the muscles in your thighs, hips and buttocks. Since lunges and squats are low impact activities, these exercises can be good choices for those who cannot handle more vigorous forms of exercise.

According to the Cleveland Clinic, 21 million Americans are affected by osteoarthritis, typically of the weight-bearing joints. The knee joint is one of the most common joints to suffer from osteoarthritis.

Knee pain has many different causes, and the recommendations of allowed activities vary with each problem. If the knee pain is related to overuse injury, arthritis, or a mechanical problem, a StairMaster may not be recommended and may irritate the problem further.

Everyone experiences joint popping occasionally, and stair climbing stretches the tendons in your knees in a way that may produce a such a sound. If the phenomenon is infrequent, it is usually harmless.

Aside from the fact that walking on a treadmill is an impact sport, knee pain can be caused by a lack of spinal rotation when striding, over pronation and incline running. Also, the treadmill maintains a steady speed which impedes your body's natural tendency to adjust its pace as necessary.

Knee injuries, however minor, can cause pain and discomfort that prevents you from engaging in your normal daily activities.

Many people include squats in their regular exercise routines to strengthen and tone their legs, hips, thighs and buttocks. Although squats can be a helpful part of your exercise routine, doing them incorrectly or with bad form can potentially result in a variety of knee injuries.