In football, players frequently hit, collide with and tackle each other in an effort to achieve the game’s objectives.

Gymnastics requires a great deal of strength, balance, coordination, agility and body awareness to perform the various moves and avoid injury. Beginners will greatly benefit from certain gymnastics drills that help to improve all areas of fitness, as well as get their bodies ready for more advanced moves.

Cycling is an aerobic exercise, which is the kind of exercise you need to perform to lose fat on any part of your body. Aerobic exercise burns many calories, and the key to losing weight is burning more calories than you consume.

The force of an object is a product of that object's acceleration and mass. English physicist Isaac Newton introduced this fundamental identity of classical mechanics with his second law of motion, F = ma. F represents force; m represents mass; and the variable a represents acceleration.

Playing sports provides participants with opportunities to develop skills in communication and team building, according to Keith Zullig, a public health researcher. These skills enable people to function effectively as leaders, as well.

Athletes participate in sports for various reasons, from a hunger for physical activity and competition to the joy of belonging to a team. Coaches can improve the team's performance by finding the right motivation for each situation and player.

Playing defensive line on a football team requires a mixture of strength, agility and speed, and each can be developed and improved with off-season workouts. An effective off-season workout routine should provide you with a combination of strength building, muscular endurance and cardiovascular training activities.

Soccer entails a combination of jogs, sprints, stops and pivots. When cleats aren't correctly sized or properly broken in, painful blisters can result, especially on the backs of heels and the soles of the feet. The best way to avoid blisters is to prevent the common causes of them.

In a practice setting, it doesn’t matter if your underwear shows beneath your gymnastics leotard, except in matters of personal taste. In competition, however, judges will actually deduct points if your underwear is visible.

Delayed onset muscle soreness, or DOMS, is caused by microscopic tears to your muscle fibers after intense physical activity that result in inflammation of the muscles. The pain is most noticeable the day after skiing.

Bacterial, viral, algal and protozoan infections are common after exposure to contaminated water. Swimming in ponds, lakes and oceans that are near developed areas may increase your risk of exposure to waste-water contamination if the areas have inadequate or overburdened sewage or waste-water treatment facilities.

Not everyone who owns a basketball keeps an air pump of some type on hand. Possibly this is because basketballs tend to maintain inflation for long periods of time. Then, one day you retrieve the ball from a closet only to find it needs air.