Your muscles need magnesium to work properly, as do all your other organs. If you do not get enough of this mineral, you may experience muscle spasms and fatigue. While too much magnesium can be dangerous as well, muscle pain and fatigue are not common side effects of this.

Spinal disks are soft and provide cushion between vertebrae. They have an exterior casing that keeps the soft center intact. A herniated disk is the rupture of the exterior casing that allows some or all of the soft center to push out.

Swelling in the legs during pregnancy is common and not necessarily a cause for concern. Changes in hormone levels, body postures and dietary habits all contribute to fluid retention or edema in the legs.

Running shoes designed to prevent small breaks in the bones of the feet are not the same as walking shoes that aim to do the same. The motion is different, according to a walking information community called The Walking Site.

If you have back problems and pain, your doctor may recommend treatments such as spinal decompression or inversion therapy. The goal is to help reduce pain and improve blood flow, but whether any of these treatments are right for you will depend upon your specific condition.

Your muscular system consists of hundreds of muscles--from the very large gluteus maximus muscle, or your butt, to the very small muscles that control your fingers. Your muscular system is responsible for movements such as walking, lifting or running and holding your body in postural alignment.

Before trying to correct your spinal alignment on your own, check with your doctor to make sure you don't have a more serious, underlying problem. Some spinal imbalances won't need a chiropractor.

A tingling sensation, a symptom also known as paresthesia, can result from many different conditions and diseases. The conditions most likely to cause tingling in the fingers include those that affect the nerves and blood vessels.

A calf muscle tear, or strain, can occur when muscle tension is excessive due to too much repetition or high force. A partial tear or complete tear can afflict one or both muscles that make up the calf. Pain, swelling, stiffness and bruising in the belly of the muscle are common signs of a torn calf muscle.

It's a common misconception that muscle injuries only happen to athletes -- not so. A pulled arm muscle, also known as an arm strain, can happen to anyone. This type of injury typically occurs when you're engaged in strenuous physical activity involving one or both of your arms.

The rectus femoris, vastus intermedius, vastus lateralis and vastus medialis muscles form the quadriceps muscle group, or quads, located on the front of your thighs. The quads extend your lower legs at the knee joints, allowing you to straighten your legs from a flexed position.

Muscle pain, spasms and cramping in the back of legs can develop for a variety of reasons. Simply straining the muscles can cause discomfort between the thighs and calves. In some cases medical conditions may lead to muscle aches or sharp pain in the back of upper legs and behind the knees.