In 1891, soccer referees moved from the touchlines onto the field of play. This brought about a new development: the introduction of a linesman, or assistant referee, on each touchline. The linesman’s role has remained fundamentally the same since that time.

As you attend a sporting event, you watch the athletes go through a number of plays, trying to score points and beat the competition. Behind the scenes, the coach is calling the shots. A sports coach is the leader and motivator to the team of players and assistant coaches.

Kids who are active in school sports are fitter, have healthier body weights and are more confident.

Timing and planning are everything when it comes to deciding when to eat prior to playing sports. Eating too much before a big game can leave you feeling tired or unmotivated. On the other hand, eating too little before playing sports can leave you feeling dizzy and weak.

In the conventional five-member triathlon family, the mini or sprint triathlon is the baby of the bunch.

The standard ball sizes intended for youth soccer players are 3, 4 and 5. Using the proper size allows children to develop their skills with soccer balls of the correct proportion. If necessary, ask the staff of your child’s soccer league or a coach which type of ball is best for your child.

Clicking sounds coming from bicycle wheels indicate something is out of adjustment or needs maintenance. Spokes and wheel bearings are potential noisemakers. Clicking or chattering at the rear wheel when you pedal suggests the freewheel may be the source.

When picking out boxing gloves for women, you have three main considerations. First, size is important to ensure a comfortable fit that minimizes risk of injury to the hands and fingers. Boxing gloves also come in different weights, ranging from 8 to 20 oz.

For every possible type of terrain, there's probably a bike designed to handle it. Pavement and trails have very different surface characteristics that demand a specialized bicycle. The road bike, designed for pavement, has over a century of racing heritage and is the predecessor of every bicycle since.

Repeatedly throwing a baseball puts your arm under a lot of stress. This can lead to injuries common in the upper arm -- from the elbow, biceps, shoulder and the triceps muscle.

One of the most important considerations when shopping for a golf driver revolves around loft. The loft of the club directly impacts the distance and trajectory of your shot as well as the direction of your ball off the tee. Drivers with 9.5 and 10.5 degrees of loft are among the most common on the market today.

The B.E.E.F. principle in basketball is an acronym that helps novice players practice proper shooting form. The acronym traditionally refers to maintaining balance, focusing eyes on the target, aligning elbows properly and following through with stable arm and hand movements.