Playing a 90-minute game of soccer is an intense experience, and affects your whole body, from your brain to your feet. Playing the sport provides cardiovascular and muscular fitness. The bulk of the work is done by your legs, but you use many other muscles as well.

If you sustain an injury to your skull that mildly damages your brain tissue, you can develop a concussion. Immediate symptoms of a concussion can include confusion, amnesia, nausea, vomiting, headache or dizziness.

No matter how vigilant you are, accidents happen, and babies sometimes sustain bumps on the head. When these incidents occur, worry about a possible concussion or more serious brain injury often follows. A concussion refers to a mild brain injury that temporarily disrupts normal brain function.

If you fall hard on your back and have a headache and nausea shortly afterward, the most likely reason is that you hurt your head during the fall and that caused a concussion. However, it is also possible that another, slightly different injury is causing these symptoms; visit your doctor for a correct diagnosis.

A concussion presents a serious brain injury, and depending on the severity of it, can present long term health ramifications or even death if you fail to properly take care of yourself afterward. If you want to resume your weight training regimen after a concussion, you must exercise caution.

Concussions are common but often go under-reported. A statement from the 3rd International Conference on Concussion defines concussion as "a complex pathophysiological process affecting the brain, induced by traumatic biochemical forces." Symptoms of a concussion can be variable.