The American Society for Testing and Materials, or ASTM, sets standards for sports safety equipment including helmets used in skating and skiing. For basic rollerblading and rollerskating, the ASTM has extended bicycle helmet standards to cover these activities because falls while skating mimic those of biking.
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As in most sporting competitions, volleyball employs referees in order to control the flow of the game and enforce the rules. The volleyball referee team includes the first referee, the second referee, the scorer and two line judges.
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Swimming provides both youth and adults with a means for physical activity and recreation throughout life.
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It's no accident that a successful volleyball spike is also known as a "kill." A well-executed spike during a game can gain points, improve team dynamics, and intimidate the opposing team. Without practicing proper form, however, players can send spikes flying out of bounds, or into the net.
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Determining whether your treadmill belt has worn out can be confusing if you don't know what to look for. Cues like fraying edges, discoloration, sluggish belt movement, or a loose "slipping" feeling can all be signs that the belt requires maintenance.
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