|
Dynamic Stretching
Stretching is a form of physical exercise in which a specific muscle or tendon (or muscle group) is deliberately flexed or stretched in order to improve the muscle's felt elasticity and achieve comfortable muscle tone. The result is a feeling of increased muscle control, flexibility, and range of motion. Stretching is also used therapeutically to alleviate cramps and to improve function in daily activities by increasing range of motion. In its most basic form, stretching is a natural and instinctive activity; it is performed by humans and many other animals. It can be accompanied by yawning. Stretching often occurs instinctively after waking from sleep, after long periods of inactivity, or after exiting confined spaces and areas. Not only vertebrates (mammals and birds), but also spiders were found to exhibit stretching in 2021. Increasing flexibility through stretching is one of the basic tenets of physical fitness. It is common for athletes to stretch before (for warming up ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warming Up
'Warming up' is a part of stretching and preparation for physical exertion or a performance by exercising or practicing gently beforehand, usually undertaken before a performance or practice. Athletes, singers, actors and others warm up before stressing their muscles. It is widely believed to prepare the muscles for vigorous actions and to prevent muscle cramps and injury due to overexertion. Exercise A warm-up generally consists of a gradual increase in intensity in physical activity (a "pulse raiser"), joint mobility exercise, and stretching, followed by the activity. For example, before running or playing an intensive sport, athletes might slowly jog to warm their muscles and increase their heart rate. It is important that warm-ups be specific to the activity, so that the muscles to be used are activated. The risks and benefits of combining stretching with warming up are disputable, although it is generally believed that warming up prepares the athlete both mentally and phy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
06 12 08 Roller Dolls 003
6 (six) is the natural number following 5 and preceding 7. It is a composite number and the smallest perfect number. In mathematics Six is the smallest positive integer which is neither a square number nor a prime number; it is the second smallest composite number, behind 4; its proper divisors are , and . Since 6 equals the sum of its proper divisors, it is a perfect number; 6 is the smallest of the perfect numbers. It is also the smallest Granville number, or \mathcal-perfect number. As a perfect number: *6 is related to the Mersenne prime 3, since . (The next perfect number is 28.) *6 is the only even perfect number that is not the sum of successive odd cubes. *6 is the root of the 6-aliquot tree, and is itself the aliquot sum of only one other number; the square number, . Six is the only number that is both the sum and the product of three consecutive positive numbers. Unrelated to 6's being a perfect number, a Golomb ruler of length 6 is a "perfect ruler". Six is a con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asana
An asana is a body posture, originally and still a general term for a sitting meditation pose,Verse 46, chapter II, "Patanjali Yoga sutras" by Swami Prabhavananda, published by the Sri Ramakrishna Math p. 111 and later extended in hatha yoga and modern yoga as exercise, to any type of position, adding reclining, standing, inverted, twisting, and balancing poses. The ''Yoga Sutras of Patanjali'' define "asana" as " position thatis steady and comfortable". Patanjali mentions the ability to sit for extended periods as one of the eight limbs of his system. Patanjali ''Yoga sutras'', Book II:29, 46 Asanas are also called yoga poses or yoga postures in English. The 10th or 11th century '' Goraksha Sataka'' and the 15th century '' Hatha Yoga Pradipika'' identify 84 asanas; the 17th century ''Hatha Ratnavali'' provides a different list of 84 asanas, describing some of them. In the 20th century, Indian nationalism favoured physical culture in response to colonialism. In that enviro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martin Brodeur
Martin Pierre Brodeur (; born May 6, 1972) is a Canadian-American former professional ice hockey goaltender and current team executive. He played 22 seasons in the National Hockey League (NHL), 21 of them for the New Jersey Devils, with whom he won three Stanley Cup championships and five Eastern Conference championships in 17 postseason campaigns. He also won two Olympic gold medals with Team Canada in the 2002 and 2010 Winter Olympic Games, as well as several other medals with Team Canada in other international competitions. Brodeur is widely regarded as one of the greatest goaltenders of all time. In 2017, he was named by the league as one of the "100 Greatest NHL Players", and the following year, he was elected to the Hockey Hall of Fame. Brodeur holds numerous NHL and franchise records among goaltenders; he ranks as the league's all-time regular season leader in wins (691), losses (397), shutouts (125), and games played (1,266). He won at least 30 games in twelve s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luis Suárez
Luis Alberto Suárez Díaz (; born 24 January 1987) is a Uruguayan professional footballer who plays as a striker for Uruguayan Primera División club Nacional and the Uruguay national team. Nicknamed ''El Pistolero'' ('The Gunman'), he is known for his passing, finishing and comfort with the ball. Suárez is regarded as one of the best players of his generation and one of the greatest strikers of all time. Suárez has won two European Golden Shoes, an Eredivisie Golden Boot, a Premier League Golden Boot, and the Pichichi Trophy. He has scored over 500 career goals for club and country. Suárez began his senior club career at Nacional in 2005. At age 19, he signed for Groningen, before transferring to Ajax in 2007. There, he won the KNVB Cup and the Eredivisie. In 2011, Suárez signed for Premier League club Liverpool, and won the League Cup in his first full season. In 2014, he equalled the goalscoring record for a 38-game Premier League season and won his first European ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Active Stretching
Active stretching eliminates force and its adverse effects from stretching procedures or it can also be defined as a stretch that requires you to retain a posture without any help other than the strength of your agonist's muscles is known as an active stretch. Active stretching stimulates and prepares muscles for use during exercise. Active stretches not only stretch the muscles and tissues, but prepares the muscles for the action by activating and warming them up or a stretch that requires you to retain a posture without any help other than the strength of your agonist's muscles is known as an active stretch.. Before describing the principles on which active stretching is based, the terms agonist and antagonist must be clarified. Agonist refers to the actively contracting muscle or muscles while their opposing muscles are termed antagonists. The neuromechanisms conceptualized by Sir Charles Sherrington (1857 - 1956), “the philosopher of the nervous system”, as applied to acti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golgi Tendon Reflex
The Golgi tendon reflex (also called inverse stretch reflex, autogenic inhibition, tendon reflex) is an inhibitory effect on the muscle resulting from the muscle tension stimulating Golgi tendon organs (GTO) of the muscle, and hence it is self-induced. The reflex arc is a negative feedback mechanism preventing too much tension on the muscle and tendon. When the tension is extreme, the inhibition can be so great it overcomes the excitatory effects on the muscle's alpha motoneurons causing the muscle to suddenly relax. This reflex is also called the inverse myotatic reflex, because it is the inverse of the stretch reflex. GTOs' inhibitory effects come from their reflex arcs: the Ib sensory fibers that are sent through the dorsal root into the spinal cord to synapse on Ib inhibitory interneurons that in turn terminate directly on the motor neurons that innervate the same muscle. The fibers also make direct excitatory synapses onto motoneurons that innervate the antagonist muscle. No ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Titin
Titin (contraction for Titan protein) (also called connectin) is a protein that in humans is encoded by the ''TTN'' gene. Titin is a giant protein, greater than 1 µm in length, that functions as a molecular spring that is responsible for the passive elasticity of muscle. It comprises 244 individually folded protein domains connected by unstructured peptide sequences. These domains unfold when the protein is stretched and refold when the tension is removed. Titin is important in the contraction of striated muscle tissues. It connects the Z line to the M line in the sarcomere. The protein contributes to force transmission at the Z line and resting tension in the I band region. It limits the range of motion of the sarcomere in tension, thus contributing to the passive stiffness of muscle. Variations in the sequence of titin between different types of striated muscle (cardiac or skeletal) have been correlated with differences in the mechanical properties of these muscles. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myofibrils
A myofibril (also known as a muscle fibril or sarcostyle) is a basic rod-like organelle of a muscle cell. Skeletal muscles are composed of long, tubular cells known as muscle fibers, and these cells contain many chains of myofibrils. Each myofibril has a diameter of 1–2 micrometres. They are created during embryonic development in a process known as myogenesis. Myofibrils are composed of long proteins including actin, myosin, and titin, and other proteins that hold them together. These proteins are organized into thick, thin, and elastic myofilaments, which repeat along the length of the myofibril in sections or units of contraction called sarcomeres. Muscles contract by sliding the thick myosin, and thin actin myofilaments along each other. Structure Each myofibril has a diameter of between 1 and 2 micrometres (μm). The filaments of myofibrils, myofilaments, consist of three types, thick, thin, and elastic filaments. *Thin filaments consist primarily of the protein actin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protein
Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, responding to stimuli, providing structure to cells and organisms, and transporting molecules from one location to another. Proteins differ from one another primarily in their sequence of amino acids, which is dictated by the nucleotide sequence of their genes, and which usually results in protein folding into a specific 3D structure that determines its activity. A linear chain of amino acid residues is called a polypeptide. A protein contains at least one long polypeptide. Short polypeptides, containing less than 20–30 residues, are rarely considered to be proteins and are commonly called peptides. The individual amino acid residues are bonded together by peptide bonds and adjacent amino acid residues. The sequence of amino acid residue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muscle
Skeletal muscles (commonly referred to as muscles) are organs of the vertebrate muscular system and typically are attached by tendons to bones of a skeleton. The muscle cells of skeletal muscles are much longer than in the other types of muscle tissue, and are often known as muscle fibers. The muscle tissue of a skeletal muscle is striated – having a striped appearance due to the arrangement of the sarcomeres. Skeletal muscles are voluntary muscles under the control of the somatic nervous system. The other types of muscle are cardiac muscle which is also striated and smooth muscle which is non-striated; both of these types of muscle tissue are classified as involuntary, or, under the control of the autonomic nervous system. A skeletal muscle contains multiple fascicles – bundles of muscle fibers. Each individual fiber, and each muscle is surrounded by a type of connective tissue layer of fascia. Muscle fibers are formed from the fusion of developmental myoblasts in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
