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Vertical Leap
A vertical jump or vertical leap is the act of jumping upwards into the air. It can be an exercise for building both endurance and strength, and is also a standard test for measuring athletic performance. It may also be referred to as a ''Sargent jump'', named for Dudley Allen Sargent. Types The vertical jump is divided into two different types: * Standing vertical jump: This refers to a vertical jump done from a standstill with no steps being involved at all. It is usually preceded by a quick crouching action. * Running vertical jump: This refers to a vertical jump after a run up: the last step of the run is used to launch into the jump. This may help to add additional energy to the jump and improve on the standing vertical jump result. In general, the standing vertical jump is the one that is used as an official measurement for athletes. Usage Vertical jump measurements are used primarily to measure athletic performance. In sports such as high jump, netball, basketball, Austra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vertical Jump Measurement Test
Vertical is a geometric term of location which may refer to: * Vertical direction, the direction aligned with the direction of the force of gravity, up or down * Vertical (angles), a pair of angles opposite each other, formed by two intersecting straight lines that form an "X" * Vertical (music), a musical interval where the two notes sound simultaneously * "Vertical", a type of wine tasting in which different vintages of the same wine type from the same winery are tasted * Vertical Aerospace, stylised as "Vertical", British aerospace manufacturer * Vertical kilometer, a discipline of skyrunning * Vertical market, a market in which vendors offer goods and services specific to an industry * Vertical integration, a management term describing a style of ownership and control Media * ''Vertical'' (film), a 1967 Soviet movie starring Vladimir Vysotsky * "Vertical" (''Sledge Hammer!''), 1987 television episode * ''Vertical'' (novel), 2010 novel by Rex Pickett * Vertical (film comp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Infrared
Infrared (IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter than microwaves. The infrared spectral band begins with the waves that are just longer than those of red light (the longest waves in the visible spectrum), so IR is invisible to the human eye. IR is generally (according to ISO, CIE) understood to include wavelengths from around to . IR is commonly divided between longer-wavelength thermal IR, emitted from terrestrial sources, and shorter-wavelength IR or near-IR, part of the solar spectrum. Longer IR wavelengths (30–100 μm) are sometimes included as part of the terahertz radiation band. Almost all black-body radiation from objects near room temperature is in the IR band. As a form of EMR, IR carries energy and momentum, exerts radiation pressure, and has properties corresponding to both those of a wave and of a particle, the photon. It was long known that fires e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flywheel Training
Flywheel training is a type of strength training where the resistance required for muscle activation is generated by the inertia of a flywheel instead of gravity from weights as in traditional weight training. In contrast to weight training, flywheel training offers variable resistance throughout the range of motion, which facilitates isoinertial training and eccentric overload. Flywheel training is shown to lead to improvements of strength and power, hypertrophy, muscle activation, muscle length, and tendon stiffness. This in turn can improve athletic performance in speed, jump height, change of direction and resilience to injury. History An early scientific research paper on flywheel training was conducted by researchers Hansen and Lindhard at the University of Copenhagen in 1924 and looked at the maximum realizable work of the elbow flexors. After that, flywheel resistance training was studied in space travelers exposed to microgravity environments to fight the effec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plyometrics
Plyometrics, also known as jump training or plyos, are exercises in which muscles exert maximum force in short intervals of time, with the goal of increasing power (speed-strength). This training focuses on learning to move from a muscle extension to a contraction in a rapid or "explosive" manner, such as in specialized repeated jumping. Plyometrics are primarily used by athletes, especially martial artists, sprinters and high jumpers, to improve performance, and are used in the fitness field to a much lesser degree. Overview Plyometrics include explosive exercises to activate the quick response and elastic properties of the major muscles. It was initially adopted by Soviet Olympians in the 1950s, and then by sportspeople worldwide. Sports using plyometrics include basketball, tennis, badminton, squash and volleyball as well as the various codes of football. The term "plyometrics" was coined by Fred Wilt after watching Soviet athletes prepare for their events in track and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isometric Exercise
An isometric exercise is an exercise involving the static contraction of a muscle without any visible movement in the angle of the joint. The term "isometric" combines the Greek words ''isos'' (equal) and ''-metria'' (measuring), meaning that in these exercises the length of the muscle and the angle of the joint do not change, though contraction strength may be varied. This is in contrast to ''isotonic contractions'', in which the contraction strength does not change, though the muscle length and joint angle do. The three main types of isometric exercise are isometric presses, pulls, and holds. They may be included in a strength training regime in order to improve the body's ability to apply power from a static position or, in the case of isometric holds, improve the body's ability to maintain a position for a period of time. Considered as an action, isometric presses are also of fundamental importance to the body's ability to prepare itself to perform immediately subsequent pow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stretch Shortening Cycle
A stretch-shortening cycle (SSC) is an active stretch ( eccentric contraction) of a muscle followed by an immediate shortening ( concentric contraction) of that same muscle. Research studies The increased performance benefit associated with muscle contractions that take place during SSCs has been the focus of much research in order to determine the true nature of this enhancement. At present, there is some debate as to where and how this performance enhancement takes place. It has been postulated that elastic structures in series with the contractile component can store energy like a spring after being forcibly stretched. Since the length of the tendon increases due to the active stretch phase, if the series elastic component acts as a spring, it would therefore be storing more potential energy. This energy would be released as the tendon shortened. Thus, the recoil of the tendon during the shortening phase of the movement would result in a more efficient movement than one in which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Center Of Mass
In physics, the center of mass of a distribution of mass in space (sometimes referred to as the barycenter or balance point) is the unique point at any given time where the weight function, weighted relative position (vector), position of the distributed mass sums to zero. For a rigid body containing its center of mass, this is the point to which a force may be applied to cause a linear acceleration without an angular acceleration. Calculations in mechanics are often simplified when formulated with respect to the center of mass. It is a hypothetical point where the entire mass of an object may be assumed to be concentrated to visualise its motion. In other words, the center of mass is the particle equivalent of a given object for application of Newton's laws of motion. In the case of a single rigid body, the center of mass is fixed in relation to the body, and if the body has uniform density, it will be located at the centroid. The center of mass may be located outside the Phys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laser
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word ''laser'' originated as an acronym for light amplification by stimulated emission of radiation. The first laser was built in 1960 by Theodore Maiman at Hughes Research Laboratories, based on theoretical work by Charles H. Townes and Arthur Leonard Schawlow and the optical amplifier patented by Gordon Gould. A laser differs from other sources of light in that it emits light that is coherence (physics), ''coherent''. Spatial coherence allows a laser to be focused to a tight spot, enabling uses such as optical communication, laser cutting, and Photolithography#Light sources, lithography. It also allows a laser beam to stay narrow over great distances (collimated light, collimation), used in laser pointers, lidar, and free-space optical communication. Lasers can also have high temporal coherence, which permits them to emit light ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swimming (sport)
Swimming is an individual or team Racing, racing sport that requires the use of one's entire body to move through water. The sport takes place in Swimming pool, pools or open water (e.g., in a sea or lake). Competitive swimming is one of the most popular Olympic sports, with varied distance events in Butterfly stroke, butterfly, backstroke, breaststroke, Freestyle swimming, freestyle, and individual medley. In addition to these individual events, four swimmers can take part in either a freestyle or medley Relay race, relay. A medley relay consists of four swimmers who will each swim a different stroke, ordered as backstroke, breaststroke, butterfly and freestyle. Swimming each stroke requires a set of specific techniques; in competition, there are distinct regulations concerning the acceptable form for each individual stroke. There are also regulations on what types of swimsuits, caps, jewelry and injury tape that are allowed at competitions. There are many health benefits to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dudley Allen Sargent
Dudley Allen Sargent (September 29, 1849 – July 21, 1924) was an American educator, lecturer and director of physical training. Biography Dudley Allen Sargent was born in Belfast, Maine on September 29, 1849, the son of Benjamin Sargent, a ship carpenter and sparmaker, and Caroline Rogers Sargent. His birthplace and childhood home was located on the west side of Penobscot Bay, and the bay and harbor provided much opportunity for activity. His father died while Dudley was a boy, and his resulting situation in life required him to devote much of his time outside of school hours to manual labor on land and at sea, under the direction of an uncle. During this time he joined with some other high school boys in putting up a horizontal bar and other apparatus on the high school grounds, and they started a gymnastic club. They were additionally inspired by reports of exhibitions given at Bowdoin College, 60 miles away in Brunswick, and gave similar public exhibitions themselves at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Figure Skating
Figure skating is a sport in which individuals, pairs, or groups perform on figure skates on ice. It was the first winter sport to be included in the Olympic Games, with its introduction occurring at the Figure skating at the 1908 Summer Olympics, 1908 Olympics in London. The Olympic disciplines are Single skating, men's singles, women's singles, pair skating, and ice dance; the four individual disciplines are also combined into a team event, which was first included in the Winter Olympics in 2014 Winter Olympics, 2014. The non-Olympic disciplines include synchronized skating, Ice theatre, Theater on Ice, and four skating. From intermediate through senior-level competition, skaters generally perform two programs (the Short program (figure skating), short program and the Free skating, free skate), which, depending on the discipline, may include figure skating spins, spins, figure skating jumps, jumps, moves in the field, Figure skating lifts, lifts, Figure skating jumps#Throw jump ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volleyball
Volleyball is a team sport in which two teams of six players are separated by a net. Each team tries to score points by grounding a ball on the other team's court under organized rules. It has been a part of the official program of the Summer Olympic Games since Tokyo 1964. Beach volleyball was introduced to the program at the Atlanta 1996 Summer Olympics. The adapted version of volleyball at the Summer Paralympic Games is sitting volleyball. Basic play The complete set of rules is extensive, but play essentially proceeds as follows: a player on one of the teams begins a 'rally' by serving the ball (tossing or releasing it and then hitting it with a hand or arm), from behind the back boundary line of the court, over the net, and into the receiving team's court. The receiving team must not let the ball be grounded within their court. The team may touch the ball up to three times to return the ball to the other side of the court, but individual players may not touch th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
