According to a new study, high school girls' lacrosse players who may, but are not required to, wear flexible headgear are at a higher risk of getting a concussion from a stick or ball impact than boys' lacrosse players, ...
Jun 25, 2020
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Children are set to move more, improve their skills, and come up with their own creative tennis games with the launch of 'HomeCourtTennis', a new initiative to assist teachers and coaches with keeping kids active while at ...
Apr 29, 2020
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A new study provides some of the earliest pieces of evidence that the COVID-19 outbreak affected people mentally as well as physically.
Apr 08, 2020
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The brain is permanently exposed to new impressions. Even when sleeping, it does not rest and processes recent experiences. In very early childhood, it has been thought that sleep primarily promotes semantic memory. This ...
Apr 07, 2020
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We feel that we live in the present. When we open our eyes, we perceive the outside world as it is right now. But we are actually living slightly in the past.
Mar 17, 2020
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Startling new evidence from medical investigators in New York suggests that "heading" a ball in soccer—in which players propel it with their heads—can lead to cognitive impairment in members of the sport who are endowed ...
(HealthDay)—Pilates is an excellent exercise discipline that develops strength and agility, and you don't need to take formal classes or use Pilates machines to get its benefits. Using a stability ball with floor exercises ...
Jan 03, 2020
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New research from La Trobe University suggests there is no evidence that changing a runner's strike pattern will help prevent injuries or give them a speed boost.
Dec 12, 2019
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Anyone who has ever tried to serve a tennis ball or flip a pancake or even play a video game knows, it is hard to perform the same motion over and over again. But don't beat yourself up—errors resulting from variability ...
Nov 08, 2019
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Whether you're mountain biking, kicking a soccer ball with friends, or just sprinting down the street to catch a bus, your quadriceps are hard at work.
Oct 24, 2019
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A ball is a round, usually spherical but sometimes ovoid, object with various uses. It is used in ball games, where the play of the game follows the state of the ball as it is hit, kicked or thrown by players. Balls can also be used for simpler activities, such as catch, marbles and juggling. Balls made from hard-wearing materials are used in engineering applications to provide very low friction bearings, known as ball bearings. Black powder weapons use stone and metal balls as projectiles.
Although many types of balls are today made from rubber, this form was unknown outside the Americas until after the voyages of Columbus. The Spanish were the first Europeans to see bouncing rubber balls (albeit solid and not inflated) which were employed most notably in the Mesoamerican ballgame. Balls used in various sports in other parts of the world prior to Columbus were made from other materials such as animal bladders or skins, stuffed with various materials.
As balls are one of the most familiar spherical objects to humans, the word "ball" is used to refer to, or to describe, anything spherical or near-spherical.
This text uses material from Wikipedia, licensed under CC BY-SA
