Knees that lock out are vulnerable to injury. Use proper form when exercising and build strength and flexibility in your legs to protect the joint.

"Yoga Journal" reports that shoulder injuries are common among practicing yogis. If shoulders are already weak and susceptible to injury, yoga postures need to be done with caution and care. Yoga poses should build strength in the shoulders without aggravating the injuries.

Boys can grow until age 20 or later. Bones grow out from the ends, known as the growth plates, which are softer than the mature bone. This growth of the long bones in the leg, along with the lengthening of connective tissue, can cause "growing pains."

According to the Mayo Clinic, your leg can swell for various reasons. For example, swelling in one leg alone may indicate an injury causing inflammation in the inflicted area. However, swelling in both legs may be the sign of a kidney or heart issue contributing to excess fluid in the body.

A "charlie horse" is a muscle spasm that can affect any muscle, but they are most common in the legs. The muscle forcefully contracts without your control and it forms a knot and becomes very tight. These can come about when you are least expecting them to happen and they can cause a lot of pain and discomfort.

Throbbing thigh pain can emerge from the knee, hip or back. The origin of the problem could be related to the muscles, bones or nerves in the legs. Throbbing can be dull or so severe that a person may find it difficult to stand or walk.

Although sprinting is an activity that can provide you with health benefits, it is also intense enough to trigger injuries. If you feel pain in your quadriceps, it could be the result of a potentially serious injury. For this reason, you should stop exercising immediately if you feel any pain.

Muscle scar tissue usually forms after an injury. The scar tissue that forms doesn't function as optimally as the old tissue did, and therefore can cause pain. While muscle scar tissue can be painful, it may not always be apparent while you are exercising, unless the scar tissue is being stretched.

Musculoskeletal pain is a common ailment. Muscle, shoulder and leg discomfort are associated with a variety of conditions that range from the most benign, such as muscle overuse and inflammation, to morbidities like polymyalgias, systemic lupus erythematous and vascular abnormalities, notes the book, "

People may fast for a variety of reasons, both spiritual and health-related. Whether you seek spiritual clarity, a detoxification of chemicals and toxins from your body, or a kick-start to your weight-loss program, fasting must be done safely to ensure no ill health effects.

An abnormal buildup of fluid in the lower extremities is known as leg edema. It is a common problem, especially with increasing age. Leg swelling has many causes including inflammation, obesity, blood clots in the legs, or a weakened heart.

Many different types of oral medications help treat type II diabetes, and some may produce side effects such as swelling. If your legs swell when you take diabetes medications, call your doctor. He may need to change medicines.