The Olympic Games that we know today are very different from the original Olympics that took place in Olympia, Greece, more than 2,700 years ago. Since then, they have been held all over the world, been attended by more than 200 countries and have included many different sports.

At higher altitudes, the air is thinner, there is less available oxygen and it becomes more difficult to breathe. There are serious risks involved with high-altitude hiking, including altitude sickness, acute mountain syndrome and pulmonary edema, all of which can result in death.

Ping pong, or table tennis, is a popular, recreational game played in activity centers and basements. It is also an official Olympic sport. The tables used for competitive table tennis must meet certain dimension specifications. The tables used for recreational ping pong do not necessarily meet these same standards.

From old school style to new school trends, there is no doubt that the BMX obsession holds strong. Even when it comes to bikes for young boys, these days there are very specific requirements for Race BMX, Freestyle BMX and Dirt BMX.

The transverse abdominis muscles are your inner abdominal muscles that lay behind the rectus abdmoninis and the oblique muscles. They help to support the back, aid in posture, and help with deep breathing in heavy lifting and in childbirth.

People have ridden two-wheeled self-powered vehicles for transport, recreation and sport since the early 17th century. The materials used in bicycle manufacture have changed significantly and modern bicycles are almost unrecognizable from the wood and iron bikes of old.

When you’ve progressed from simple skateboarding and are ready to make the commitment to traveling downhill and learning tricks, you also need to make a renewed commitment to safety.

A skateboard without grip tape is not a complete skateboard. Although it doesn't get the same amount of attention as the deck, the bearings and the wheels, grip tape is one of the most crucial elements of any skateboard.

Group exercises and activities aim to encourage team building and trust among students in your classroom. Students are actively engaged in their learning while participating within groups. Teachers can use these activities to informally evaluate students’ understanding of the lesson or topic being taught.

A majority of bicycles use a rim style brake, such as a caliper or direct-pull cantilever, but some cyclists prefer disc brakes. Unlike rim-mounted brakes, disc brakes are placed on the side of the wheel hub, though they operate similarly with two brake pads squeezing the disc to slow the bicycle.

You don’t have to be stuck just playing the traditional game of pingpong on your pingpong table. There are a variety of other entertaining games that you can play on the same long surface.

No matter what kind of bike you ride, you have a choice between platform pedals, toe clips or clipless pedals. Basic platform pedals are wide and flat and can accommodate most shoes. Toe clips are metal or plastic cages that bolt to platform pedals and keep your foot in place with adjustable nylon straps.