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Stretching
Stretching is a form of physical exercise in which a specific muscle or tendon (or muscle group) is deliberately expanded and flexed 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. In addition to vertebrates (e.g. mammals and birds), spiders have also been found to exhibit stretching. Increasing flexibility through stretching is one of the basic tenets of physical fitness. It is common for athletes to stretch before (for ... [...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 ph ... [...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 a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asana
An āsana (Sanskrit: आसन) 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 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cramps
A cramp is a sudden, involuntary, painful skeletal muscle contraction or overshortening associated with electrical activity. While generally temporary and non-damaging, they can cause significant pain and a paralysis-like immobility of the affected muscle. A cramp usually goes away on its own over several seconds or (sometimes) minutes. Cramps are common and tend to occur at rest, usually at night (nocturnal leg cramps). They are also often associated with pregnancy, physical exercise or overexertion, and age (common in older adults); in such cases, cramps are called idiopathic because there is no underlying pathology. In addition to those benign conditions cramps are also associated with many pathological conditions. Cramp definition is narrower than the definition of muscle spasm: spasms include any involuntary abnormal muscle contractions, while cramps are sustained and painful. True cramps can be distinguished from other cramp-like conditions. Cramps are different from musc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypermobility (joints)
Hypermobility, also known as double-jointedness, describes joints that stretch farther than normal. For example, some hypermobile people can bend their thumbs backwards to their Wrist, wrists, bend their knee joints backwards, put their leg behind the head, or perform other contortionist "tricks". It can affect one or more joints throughout the body. Hypermobile joints are common and occur in about 10 to 25% of the population. In a minority of people, pain and other symptoms are present. This may be a sign of hypermobility spectrum disorder (HSD). Hypermobile joints are a feature of genetic Connective tissue disease#Heritable connective tissue disorders, connective tissue disorders such as hypermobility spectrum disorder or Ehlers–Danlos syndrome (EDS). Until new diagnostic criteria were introduced, hypermobility syndrome was sometimes considered identical to hypermobile Ehlers–Danlos syndrome (hEDS), formerly called EDS Type 3. As no genetic test can distinguish the two condi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alex Ovechkin
Alexander Mikhailovich Ovechkin (, ; born 17September 1985) is a Russian professional ice hockey Winger (ice hockey), left winger and Captain (ice hockey), captain of the Washington Capitals of the National Hockey League (NHL). Nicknamed "the Great 8" (in reference to his jersey number) and "Ovi", Ovechkin has scored List of NHL players with 500 goals, the most career goals in NHL regular season history, and he is widely regarded as one of the greatest ice hockey players of all time. Ovechkin began his professional career with HC Dynamo Moscow, Dynamo Moscow of the Russian Superleague in 2001, playing there for four seasons. Ovechkin was selected by the Capitals List of first overall NHL draft picks, first overall in the 2004 NHL Entry Draft. In the 2005–06 NHL season, 2005–06 season, Ovechkin captured the Calder Memorial Trophy as rookie of the year and finished third overall in league scoring. Ovechkin has won the Maurice "Rocket" Richard Trophy as the NHL's leading goal ... [...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 Association football, footballer who plays as a Striker (association football), striker for Major League Soccer club Inter Miami CF, Inter Miami. Known for his goal scoring ability, movement, and clinical finishing, he is widely regarded as one of the best players of his generation. Nicknamed "El Pistolero" ("The Gunman"), individually, he has won two European Golden Shoes, an Eredivisie#Top scorers, Eredivisie Golden Boot, a Premier League Golden Boot and a Pichichi Trophy. He has scored List of footballers with 500 or more goals, over 500 career goals for club and country. Suárez is Uruguay's Uruguay national football team#Records, all-time leading goalscorer. Suárez began his senior club career at Uruguayan club Club Nacional de Football, Nacional in 2005. He signed for FC Groningen, Groningen the following year, before transferring to AFC Ajax, Ajax in 2007. There, he won the 2009–10 KNVB C ... [...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. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Titin
Titin (; also called connectin) is a protein that in humans is encoded by the ''TTN'' gene. The protein, which is over 1 μm in length, 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 disc to the M line in the sarcomere. The protein contributes to force transmission at the Z disc 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. Titin is the third most abundant protein in m ... [...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 act ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
