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Mat (gymnastics)
Mats are used for safety in gymnastics, and in training new skills. They are usually a piece of foam (covered in leather) ranging from 1.5-28 inches thick, covered in a vinyl or plastic lining. The foam ranges in density from relatively firm to very soft. Landing mats are usually blue, but can also be almost any other color. Mats come in a range of sizes, from very small mats used on the beam, to very large mats, used in the foam pits. Typically, in both competition and practice, the use of mats is mandatory. On every event except floor exercise, pommel horse and vault, gymnasts may use an additional landing mat, without deduction, which may be adjusted for distance. Types Beam pads These are thin mats that fasten around the balance beam. They are used only in training to give gymnasts training high-level skills additional protection and a wider landing space while working on the apparatus. Makeshift beam pads can also be constructed from soft mats placed over the beam su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnastics
Gymnastics is a type of sport that includes physical exercises requiring balance, strength, flexibility, agility, coordination, dedication and endurance. The movements involved in gymnastics contribute to the development of the arms, legs, shoulders, back, chest, and abdominal muscle groups. Gymnastics evolved from exercises used by the ancient Greeks that included skills for mounting and dismounting a horse, and from circus performance skills. The most common form of competitive gymnastics is artistic gymnastics (AG), which consists of, for women (WAG), the events floor, vault, uneven bars, and beam; and for men (MAG), the events floor, vault, rings, pommel horse, parallel bars, and horizontal bar. The governing body for gymnastics throughout the world is the Fédération Internationale de Gymnastique (FIG). Eight sports are governed by the FIG, which include gymnastics for all, men's and women's artistic gymnastics, rhythmic gymnastics, trampolining (including double mini-t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cross-linked Polyethylene
Cross-linked polyethylene, commonly abbreviated PEX, XPE or XLPE, is a form of polyethylene with cross-links. It is used predominantly in building services pipework systems, hydronic radiant heating and cooling systems, domestic water piping, insulation for high tension (high voltage) electrical cables, and baby play mats. It is also used for natural gas and offshore oil applications, chemical transportation, and transportation of sewage and slurries. PEX is an alternative to polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC) or copper tubing for use as residential water pipes. Properties Low-temperature impact strength, abrasion resistance and environmental stress cracking resistance can be increased significantly by crosslinking, whereas hardness and rigidity are somewhat reduced. Compared to thermoplastic polyethylene, PEX does not melt (analogous to elastomers) and is thermally resistant (over longer periods of up to 120 °C, for short periods without el ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yurchenko (vault)
Yurchenko, also known as round-off entry vaults, are a family of vaults performed in artistic gymnastics in which the gymnast does a round-off onto the springboard and a back handspring onto the horse or vaulting table. The gymnast then performs a salto, which may range in difficulty from a simple single tuck to a triple twist layout. Different variations in the difficulty of the salto lead to higher D-scores. This family of vaults is the most common type of vault in gymnastics and its named after Natalia Yurchenko, who first performed it in 1982. Background and history The Yurchenko vault family is named after Natalia Vladimirovna Yurchenko, a gymnast who trained under Vladislav Rastorotski. The pair designed a new way of moving onto the vaulting horse. They first tested the new approach by using a foam pit, and then introduced the move to the runway and vault horse. In 1982, she performed the vault for the first time at a competition in Moscow. The move’s popularity grew ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Code Of Points (artistic Gymnastics)
The ''Code of Points'' is a rulebook that defines the scoring system for each level of competition in gymnastics. There is not a universal international ''Code of Points'', and every oversight organization — such as the FIG (Fédération Internationale de Gymnastique), NCAA Gymnastics, and most national gymnastics federations — designs and employs its own unique ''Code of Points''. The FIG Code of Points The FIG Code of Points is defined in a public document provided by the Federation. Gymnasts competing at lower levels or outside the FIG's jurisdiction (e.g., NCAA gymnastics and local club teams) may not be scored according to the FIG code. 2006 Revised Code In 2006, the ''Code of Points'' and the entire gymnastics scoring system were completely overhauled. The change stemmed from the judging controversy at 2004 Olympics in Athens, which brought the reliability and objectivity of the scoring system into question, and arguments that execution had been sacrificed for diff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roll (gymnastics)
A roll is the most basic and fundamental skill in gymnastics class. There are many variations in the skill. Rolls are similar to flips in the fact that they are a complete rotation of the body, but the rotation of the roll is usually made on the ground while a flip is made in the air with the hips passing over the head and without any hands touching the ground. Rolls also help recover from a fall safely. Forward roll The forward roll (colloquially called a roly poly) is one of the most basic elements in gymnastics and one of the first learnt. The forward roll is started from a standing position and then the gymnast crouches down, places their hands shoulder wide apart and hands facing forward. They tuck their chin to their chest and place the back of their head onto the floor. They then push off of the floor with their legs and rotate over their head onto their back. The gymnast then presses their feet onto the floor and whips the arms forward to stand up. Backward roll The ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Right Triangle
A right triangle (American English) or right-angled triangle (British), or more formally an orthogonal triangle, formerly called a rectangled triangle ( grc, ὀρθόσγωνία, lit=upright angle), is a triangle in which one angle is a right angle (that is, a 90-degree angle), i.e., in which two sides are perpendicular. The relation between the sides and other angles of the right triangle is the basis for trigonometry. The side opposite to the right angle is called the ''hypotenuse'' (side ''c'' in the figure). The sides adjacent to the right angle are called ''legs'' (or ''catheti'', singular: ''cathetus''). Side ''a'' may be identified as the side ''adjacent to angle B'' and ''opposed to'' (or ''opposite'') ''angle A'', while side ''b'' is the side ''adjacent to angle A'' and ''opposed to angle B''. If the lengths of all three sides of a right triangle are integers, the triangle is said to be a Pythagorean triangle and its side lengths are collectively known as a ''Pythagor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Incline Handstand
Incline, inclined, inclining, or inclination may refer to: *Grade (slope), the tilt, steepness, or angle from horizontal of a topographic feature (hillside, meadow, etc.) or constructed element (road, railway, field, etc.) *Slope, the tilt, steepness, or angle from horizontal of a line (in mathematics and geometry) Incline may also refer to: *Cable railway, a steeply graded railway that uses a cable or rope to haul trains **Funicular (or funicular railway, a type of cable railway), a cable railway in which a cable attached moves cars up and down a steep slope *Inclined loop, a feature found on some roller coasters *Orbital inclination, the tilt of an object's orbit around a celestial body **Inclined orbit, an orbit that does not lie on the equatorial plane *Inclined plane, a flat surface whose endpoints are at different heights *Inclined rig, a method of rigging a sail to direct the force of the sails in such a way as to reduce heeling *Inclining test, a test that determines a ship ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sure-footed
Sure-footedness is the ability, especially when hiking or mountain climbing, to negotiate difficult or rough terrain safely. Such situations place demands on a person's coordination and reserves of strength as well as requiring sufficient appreciation of the terrain. A person who is sure-footed is thus unlikely to slip or stumble, and will have a good head for heights when required. On many hiking trails and mountain tours, sure-footedness is assumed to be a prerequisite without ever being defined. The term is frequently used in the literature presumably to ensure that the reader is made sufficiently aware that, under certain circumstances, one false step may lead to serious consequences. Required attributes Although there is no standard definition of sure-footedness, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyurethane
Polyurethane (; often abbreviated PUR and PU) refers to a class of polymers composed of organic chemistry, organic units joined by carbamate (urethane) links. In contrast to other common polymers such as polyethylene and polystyrene, polyurethane is produced from a wide range of starting materials. This chemical variety produces polyurethanes with different chemical structures leading to many List of polyurethane applications, different applications. These include rigid and flexible foams, varnishes and coatings, adhesives, Potting (electronics), electrical potting compounds, and fibers such as spandex and Polyurethane laminate, PUL. Foams are the largest application accounting for 67% of all polyurethane produced in 2016. A polyurethane is typically produced by reacting an isocyanate with a polyol. Since a polyurethane contains two types of monomers, which polymerize one after the other, they are classed as Copolymer#Alternating copolymers, alternating copolymers. Both the isocy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floor Exercise
In gymnastics, the floor is a specially prepared exercise surface, which is considered an apparatus. It is used by both male and female gymnasts. The gymnastics event performed on the floor is called floor exercise. The English abbreviation for the event in gymnastics scoring is FX. A spring floor is used in all of gymnastics to provide more bounce, and also help prevent potential injuries to lower extremity joints of gymnasts due to the nature of the apparatus, which includes the repeated pounding required to train it. Cheerleading also uses spring floors for practice. The sprung floor used for indoor athletics, however, is designed to reduce bounce. The apparatus The apparatus originated as a 'free exercise' for men, very similar to the floor exercise of today. Most competitive gymnastics floors are spring floors. They contain springs and/or a rubber foam and plywood combination which make the floor bouncy, soften the impact of landings, and enable the gymnast to gain heigh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cross-linked Polyethylene
Cross-linked polyethylene, commonly abbreviated PEX, XPE or XLPE, is a form of polyethylene with cross-links. It is used predominantly in building services pipework systems, hydronic radiant heating and cooling systems, domestic water piping, insulation for high tension (high voltage) electrical cables, and baby play mats. It is also used for natural gas and offshore oil applications, chemical transportation, and transportation of sewage and slurries. PEX is an alternative to polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC) or copper tubing for use as residential water pipes. Properties Low-temperature impact strength, abrasion resistance and environmental stress cracking resistance can be increased significantly by crosslinking, whereas hardness and rigidity are somewhat reduced. Compared to thermoplastic polyethylene, PEX does not melt (analogous to elastomers) and is thermally resistant (over longer periods of up to 120 °C, for short periods without el ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Velcro
Velcro, officially known as Velcro IP Holdings LLC and trading as Velcro Companies, is a British privately held company, founded by Swiss electrical engineer George de Mestral in the 1950s. It is the original manufacturer of hook-and-loop fasteners, which de Mestral invented. History Swiss electrical engineer George de Mestral invented his first touch fastener when, in 1941, he went for a walk in the Alps, and wondered why burdock seeds clung to his woolen socks and coat, and also his dog Milka. He discovered it could be turned into something useful. He patented it in 1955, and subsequently refined and developed its practical manufacture until its commercial introduction in the late 1950s. The fastener consisted of two components: a lineal fabric strip with tiny hooks that could 'mate' with another fabric strip with smaller loops, attaching temporarily, until pulled apart. Initially made of cotton, which proved impractical, the fastener was eventually constructed with nylon a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
