An official sprint triathlon involves a 750-meter swim, a 20-kilometer bike ride and 5K run. If you've signed up to take on this challenge, you may wonder what constitutes a respectable showing. Although you don't expect to hang with the leaders, you probably don't want to be struggling in the back either.

Removing the fork and stem from your bicycle isn't a professional task. With a little bit of elbow grease, you can easily swap out a new stem or a new fork without cutting cables or calling upon your local bike professionals.

For those who are physically fit, riding a bike at age 50 isn’t much different than it was at 15. Most 50-year-olds aren’t as fit as they once were, however. They may have heart, knee, hip or back problems to consider. If you’re in that group, don’t let physical challenges stop you from enjoying the sport of cycling.

Swimming can be a highly competitive sport -- even at the 11- to 12-year-old level. A lot of pressure is on youth swimmers to perform at the top of their game to win swim meets. Some swimmers might be naturally fast while others may require training to reach improved swimming times.

The rules of a baseball game as specified by Major League Baseball strive for fairness in all aspects of the game and prohibit the use of distracting motions, equipment or behavior that gives a player a competitive advantage.

As basketball is a high-intensity, fast-moving sport, players aren't strangers to leg and knee injuries. Knee sleeves help offer support to sore knees, but they don't replace stronger braces or time off the court when it comes to serious injuries.

Gymnastics requires movements on various pieces of equipment such as the pummel horse, parallel bars, rings and high bar. To do these movements with maximum ease and safety in mind, gymnasts must wear the proper clothes.

Swimming is a low-impact activity that is typically recommended when a person experiences back pain. However swimming, like many other exercises, can have adverse effects when performed with improper form. This includes placing strain on your back.

Race car driving is a physically demanding job. Professional racers are not only skilled drivers, they're also athletes. No matter what the sport, the highly skilled and trained person holds an advantage in competition.

A loose chain will ruin your ride at best and pose a safety issue at worst. If your bike chain keeps loosening up, you need to find the cause of the problem and address it before riding again. The cause may differ from bike to bike because the mechanics vary.

Elite artistic gymnasts are the best gymnasts in the world, competing for rankings and medals. Elite gymnastics begin once a gymnast has surpassed level 10 and met the elite requirements. In the United States, elite gymnasts are members of USA Gymnastics and follow the Federation de Internationale Code of Points.

The one pitch every slow-pitch pitcher needs in his arsenal is the screwball. With proper technique, a right-handed pitcher can make the ball appear as if it is going to cross over the middle of home plate, but then it curves in toward the hands of a right-handed batter or away from a left-handed batter.