A soccer field is rectangular with white painted lines marking its boundaries. When a ball is played completely across one of the outside lines, the ball is out of bounds and play stops completely. There must be visible grass between the ball and the white line for the ball to …

It’s all too easy to forget you’re wearing your contact lenses when you drift off to sleep for a short nap, but you probably won’t forget about them upon waking. Most lens wearers have experienced the dry, irritable feeling of contacts left in during a nap, and in fact, sleeping …

Numbness is a symptom associated with a plethora of diseases and disorders. Transient numbness not accompanied by pain or changes in skin color may be a normal response to cold temperatures or other benign conditions. Persistent or recurrent numbness, however, always requires medical attention. Unless other symptoms are present, extensive …

Muhammad Ali is considered one of the greatest heavyweight boxers of all time. The charismatic Ali ranked No. 3 on ESPN’s list of the greatest athletes of the 20th century behind Michael Jordan and Babe Ruth. Ali’s speed, quickness and athleticism belied his training style. He was not known for …

When watching a game, you may have noticed various stickers beyond team emblems on football players’ helmets. These stickers have different meanings depending on what kind of sticker it is. These stickers can be for player achievements, for officiating or team use and for commemorative purposes. Sometimes, football teams like …

Water polo looks graceful above water, but under the surface, it is demanding. You kick continuously to stay afloat and propel yourself in the air. Competitors push and pull underwater, usually out of the view of referees. Water polo is a form of aerobic exercise that takes exceptional conditioning and …

Soccer is a game of athleticism and conditioning. These are the foundations of the game. If you go out on the field without them, you will fall hopelessly behind and won’t be able to compete. The game requires multiple skills, including the ability to advance the ball upfield by dribbling …

Footballs have been made out of a variety of materials over the years, including bladders, hides, rubber, paint, leather and string. According to Timothy Gay in “Football Physics: The Science of the Game,” the shape of the ball is a prolate spheroid. This flattened sphere shape not only makes for …

Gelatin is a natural protein derived from the processing of animal collagen. Contrary to popular belief, gelatin is not rendered from the feet or horns of animals, which are made of keratin, the same material as your fingernails or hair. Rather, gelatin is obtained from cattle hide and bones and …

The fight strap on a hockey jersey attaches the player¡¯s jersey to his pants, ensuring that his jersey cannot come off during a fight. Players who fight without a fight strap run the risk of receiving an extra penalty as a result. This rule prevents players from ending up with …