|
Treading Water
Treading water or water treading is what a Human swimming, swimmer can do while in a vertical position to keep their head above the surface of the water, while not providing sufficient directional thrust to overcome inertia and propel the swimmer in any specific direction. As it expends less energy than traditional strokes, it is often used by swimmers to rest in between periods of exertion without having to leave the water. In figurative language, the expression "treading water" has become a metaphor for an effort expected to create motion, but which actually results in merely staying in one, possibly barely sustainable, place. Methods Any sort of movement that allows the swimmer to do this can be classified as treading water, but it is more efficient to move the arms and legs in a specific fashion. Non-swimmers often splash and kick in an effort to stay above the surface but their lack of technique along with shortness of breath and the panic factor make for a very ineffectiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Human Swimming
Swimming is the self-propulsion of a person through water, such as saltwater or freshwater environments, usually for recreation, sport, exercise, or survival. Swimmers achieve locomotion by coordinating limb and body movements to achieve hydrodynamic thrust that results in directional motion. Newborns can instinctively hold their breath underwater and exhibit rudimentary swimming movements as part of a survival reflex. Swimming requires endurance, skill and efficient techniques to maximize speed and minimize energy consumption. Swimming is a popular activity and competitive sport where certain techniques are deployed to move through water. It offers numerous health benefits, such as strengthened cardiovascular health, muscle strength, and increased flexibility. It is suitable for people of all ages and fitness levels. Swimming is consistently among the top public recreational activities, and in some countries, swimming lessons are a compulsory part of the educational curriculum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thrust
Thrust is a reaction force described quantitatively by Newton's third law. When a system expels or accelerates mass in one direction, the accelerated mass will cause a force of equal magnitude but opposite direction to be applied to that system. The force applied on a surface in a direction perpendicular or normal to the surface is also called thrust. Force, and thus thrust, is measured using the International System of Units (SI) in newtons (symbol: N), and represents the amount needed to accelerate 1 kilogram of mass at the rate of 1 meter per second per second. In mechanical engineering, force orthogonal to the main load (such as in parallel helical gears) is referred to as static thrust. Examples A fixed-wing aircraft propulsion system generates forward thrust when air is pushed in the direction opposite to flight. This can be done by different means such as the spinning blades of a propeller, the propelling jet of a jet engine, or by ejecting hot gases f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inertia
Inertia is the natural tendency of objects in motion to stay in motion and objects at rest to stay at rest, unless a force causes the velocity to change. It is one of the fundamental principles in classical physics, and described by Isaac Newton in his Newton%27s_laws_of_motion#First, first law of motion (also known as The Principle of Inertia). It is one of the primary manifestations of mass, one of the core quantitative properties of physical systems. Newton writes: In his 1687 work ''Philosophiæ Naturalis Principia Mathematica'', Newton defined inertia as a property: History and development Early understanding of inertial motion Joseph NeedhamProfessor John H. Lienhard points out the Mozi (book), Mozi – based on a Chinese text from the Warring States period (475–221 BCE) – as having given the first description of inertia. Before the European Renaissance, the prevailing theory of motion in western philosophy was that of Aristotle (384–322 BCE). On the surface ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Figurative Language
The distinction between literal and figurative language exists in all natural languages; the phenomenon is studied within certain areas of language analysis, in particular stylistics, rhetoric, and semantics. *Literal language is the usage of words exactly according to their direct, straightforward, or conventionally accepted meaning (linguistics), meanings: their denotation. *Figurative (or non-literal) language is the usage of words in addition to, or deviating beyond, their conventionally accepted definitions in order to convey a more complex meaning or achieve a heightened effect. This is done by language-users presenting words in such a way that their audience equates, compares, or associates the words with normally unrelated meanings. A common intended effect of figurative language is to elicit audience responses that are especially emotional (like excitement, shock, laughter, etc.), aesthetic, or intellectual. The Ancient Greece, ancient Greek philosopher Aristotle, and lat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metaphor
A metaphor is a figure of speech that, for rhetorical effect, directly refers to one thing by mentioning another. It may provide, or obscure, clarity or identify hidden similarities between two different ideas. Metaphors are usually meant to create a likeness or an Analogy, analogy. Analysts group metaphors with other types of figurative language, such as antithesis, hyperbole, metonymy, and simile. According to Grammarly, "Figurative language examples include similes, metaphors, personification, hyperbole, allusions, and idioms." One of the most commonly cited examples of a metaphor in English literature comes from the "All the world's a stage" monologue from ''As You Like It'': All the world's a stage, And all the men and women merely players; They have their exits and their entrances And one man in his time plays many parts, His Acts being seven ages. At first, the infant... :—William Shakespeare, ''As You Like It'', 2/7 This quotation expresses a metaphor because the w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flutter Kick
The flutter kick is a kicking movement used in both swimming and calisthenics. Swimming In swimming, the flutter kick refers to an alternating up and down movement of the legs. It is seen in front crawl and backstroke. The downbeat refers to the portion of each individual kick where the leg moves downwards, and the upbeat refers to the repositioning of the leg upwards. In front crawl, the flutter kick is sometimes referred to as the front crawl kick, and in backstroke it is sometimes called the backstroke kick. Phases In front crawl, the downbeat of each kick is initiated by the simultaneous action of bending the knee and flexing the hip to push down on the water with the thigh. The knee then extends forcefully, pushing the lower leg against the water until the leg is straight. The ankle then extends, pushing the foot into the water until it is inline with the rest of the leg. When the knee extends for the downbeat, it also has the effect of lifting the thigh and initiating t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bicycle
A bicycle, also called a pedal cycle, bike, push-bike or cycle, is a human-powered transport, human-powered or motorized bicycle, motor-assisted, bicycle pedal, pedal-driven, single-track vehicle, with two bicycle wheel, wheels attached to a bicycle frame, frame, one behind the other. A is called a cyclist, or bicyclist. Bicycles were introduced in the 19th century in Europe. By the early 21st century there were more than 1 billion bicycles. There are many more bicycles than cars. Bicycles are the principal Mode of transport, means of transport in many regions. They also provide a popular form of recreation, and have been adapted for use as Toy, children's toys. Bicycles are used for Physical fitness, fitness, Military bicycle, military and Police bicycle, police applications, Bicycle messenger, courier services, Cycle sport, bicycle racing, and artistic cycling. The basic shape and configuration of a typical Safety bicycle, upright or "safety" bicycle, has changed lit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lifeguard
A lifeguard is a rescuer who supervises the safety and rescue of swimmers, surfers, and other water sports participants such as in a swimming pool, water park, beach, spa, river and lake. Lifeguards are trained in swimming and Cardiopulmonary resuscitation, CPR/Automated external defibrillator, AED first aid, certified in water rescue using a variety of aids and equipment depending on requirements of their particular venue. In some areas, lifeguards are part of the emergency services system to incidents and in some communities, lifeguards may function as the primary Emergency medical service, EMS provider. Responsibilities A lifeguard is responsible for the safety of people in an area of water, and usually a defined area immediately surrounding or adjacent to it, such as a beach next to an ocean or lake. The priority is to ensure no harm comes to users of the area for which they are responsible. Lifeguards often take on this responsibility upon employment, However, there ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
First Aid
First aid is the first and immediate assistance given to any person with a medical emergency, with care provided to preserve life, prevent the condition from worsening, or to promote recovery until medical services arrive. First aid is generally performed by someone with basic medical or first response training. Mental health first aid is an extension of the concept of first aid to cover mental health, while psychological first aid is used as early treatment of people who are at risk for developing Post-traumatic stress disorder, PTSD. Conflict first aid, focused on preservation and recovery of an individual's social or relationship well-being, is being piloted in Canada. There are many situations that may require first aid, and many countries have legislation, regulation, or guidance, which specifies a minimum level of first aid provision in certain circumstances. This can include specific training or equipment to be available in the workplace (such as an Automated External ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Polo
Water polo is a competitive sport, competitive team sport played in water between two teams of seven players each. The game consists of four quarters in which the teams attempt to score goals by throwing the water polo ball, ball into the opposing team's goal (sport), goal. The team with more goals at the end of the game wins the match. Each team is made up of six field players and one Goalkeeper (water polo), goalkeeper. Excluding the goalkeeper, players participate in both offensive and defensive roles. It is typically played in an all-deep swimming pool, pool where players cannot touch the bottom. A game consists mainly of the players swimming to move about the pool, treading water (mainly using the eggbeater kick), passing the ball, and shooting at the goal. Teamwork, tactical thinking and awareness are also highly important aspects. Water polo is a highly physical and demanding sport and has frequently been cited as one of the most difficult to play. Special equipment for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synchronized Swimming
Synchronized swimming (in British English, synchronised swimming), also known as artistic swimming, is a sport where swimmers perform a synchronized choreographed routine, accompanied by music. The sport is governed internationally by World Aquatics (formerly known as FINA). It has traditionally been a women's sport, although FINA introduced a new mixed gender duet competition that included one male swimmer in each duet at the 2015 World Aquatics Championships and European Aquatics introduced men's individual events at the 2022 European Aquatics Championships. From 2024, men are able to compete in the team event at the Olympics. Synchronized swimming has been part of the Summer Olympics program since 1984, featuring both women's duet and team events. In 2017, under the instruction of the International Olympic Committee (IOC), FINA renamed the sport from "synchronized swimming" to "artistic swimming" —a decision that has faced controversy. The new official name has yet t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dog Paddle
The dog paddle or doggy paddle is a simple swimming style. It is characterized by the swimmer lying on their chest and moving their hands and legs alternately in a manner reminiscent of how dogs and other quadrupedal mammals swim. It is effectively a "trot" in water, instead of land. It was the first swimming stroke used by ancient humans, believed to have been learned by observing animals swim. Prehistoric cave paintings in Egypt show figures doing what appears to be the dog paddle. It is often the first swimming stroke used by young children when they are learning to swim. The dog paddle has also been taught as a military swimming stroke when a silent stroke is needed - since neither arms nor legs break the surface. See also * Human swimming * Front crawl * Breaststroke Breaststroke is a human swimming, swimming style in which the swimmer is on their chest and the torso does not rotate. It is the most popular recreational style due to the swimmer's head being out of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
