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Curlups
The crunch or curl-up is an abdominal exercise that works the rectus abdominis muscle. It enables both building and defining "six-pack" abs and tightening the belly. Crunches use the exerciser's own body weight to tone muscle and are recommended by some experts, despite negative research results, as a low-cost exercise that can be performed at home. Crunches are less effective than other exercises such as planks and carry risk of back injury. Form The biomechanics professor Stuart McGill was quoted in ''The New York Times Health'' blog as stating: An approved crunch begins with you lying down, one knee bent, and hands positioned beneath your lower back for support. "Do not hollow your stomach or press your back against the floor", McGill says. Gently lift your head and shoulders, hold briefly and relax back down. Research has shown that both sit-ups and crunches are mediocre strength-building exercises and have injured many people. In a crunch, unlike a sit-up, the lower bac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bodyweight Exercises
Calisthenics (American English) or callisthenics (British English) () is a form of strength training that utilizes an individual's body weight as resistance to perform multi-joint, compound movements with little or no equipment. Calisthenics solely rely on bodyweight for resistance, which naturally adapts to an individual's unique physical attributes like limb length and muscle-tendon insertion points. This allows calisthenic exercises to be more personalized and accessible for various body structures and age ranges. Calisthenics is distinct for its reliance on closed-chain movements. These exercises engage multiple joints simultaneously as the resistance moves relative to an anchored body part, promoting functional and efficient movement patterns. Calisthenics' exercises and movement patterns focuses on enhancing overall strength, stability, and coordination. The versatility that calisthenics introduces, minimizing equipment use, has made calisthenics a popular choice for encour ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abdominal Exercise
Abdominal exercises are a type of strength exercise that affect the abdominal muscles (colloquially known as the stomach muscles or "abs"). Human abdominal consist of four muscles which are the rectus abdomens, internal oblique, external oblique, and transversus abdominis. When performing abdominal exercises it is important to understand the effects, functions, the types of exercises, and think about how to perform this exercise safely. Effects Abdominal exercises are useful for building abdominal muscles. This is useful for improving performance with certain sports, back pain, and for withstanding abdominal impacts (e.g., taking punches). According to a 2011 study, abdominal muscle exercises are known to increase the strength and endurance of the abdominal muscles. It has been highly disputed whether or not abdominal exercises have any reducing effect on abdominal fat. The aforementioned 2011 study found that abdominal exercise does not reduce abdominal fat; to achieve that, a de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rectus Abdominis Muscle
The rectus abdominis muscle, () also known as the "abdominal muscle" or simply better known as the "abs", is a pair of segmented skeletal muscle on the ventral aspect of a person's abdomen. The paired muscle is separated at the midline by a band of dense connective tissue called the linea alba, and the connective tissue defining each lateral margin of the rectus abdominus is the linea semilunaris. The muscle extends from the pubic symphysis, pubic crest and pubic tubercle inferiorly, to the xiphoid process and costal cartilages of the 5th–7th ribs superiorly. The rectus abdominis muscle is contained in the rectus sheath, which consists of the aponeuroses of the lateral abdominal muscles. Each rectus abdominus is traversed by bands of connective tissue called the tendinous intersections, which interrupt it into distinct muscle bellies. Structure The rectus abdominis is a very long flat muscle, which extends along the whole length of the front of the abdomen, and is s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plank (exercise)
The plank (also called a front hold, hover, or abdominal bridge) is an isometric exercise, isometric core (anatomy), core strength exercise that involves maintaining a position similar to a push-up. Form The most common plank is the forearm plank which is held in a push-up-like position, with the body's weight borne on forearms, elbows, and toes. Many variations exist such as the side plank and the reverse plank. The plank is commonly practiced in Pilates and yoga as exercise where it is called Chaturanga Dandasana, and by those training for boxing and other sports. The "extended plank" adds substantial difficulty to the standard plank exercise. To perform the extended plank, a person begins in the push-up position and then extends the arms or hands as far forward as possible. Effect The plank strengthens the abdominals, back, and shoulders. Muscles involved in the front plank include: * Primary muscles: erector spinae muscles, erector spinae, rectus abdominis muscle, rec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biomechanics
Biomechanics is the study of the structure, function and motion of the mechanical aspects of biological systems, at any level from whole organisms to Organ (anatomy), organs, Cell (biology), cells and cell organelles, using the methods of mechanics. Biomechanics is a branch of biophysics. Etymology The word "biomechanics" (1899) and the related "biomechanical" (1856) come from the Ancient Greek βίος ''bios'' "life" and μηχανική, ''mēchanikē'' "mechanics", to refer to the study of the mechanical principles of living organisms, particularly their movement and structure. Subfields Biofluid mechanics Biological fluid mechanics, or biofluid mechanics, is the study of both gas and liquid fluid flows in or around biological organisms. An often studied liquid biofluid problem is that of blood flow in the human cardiovascular system. Under certain mathematical circumstances, blood flow can be modeled by the Navier–Stokes equations. ''In vivo'' whole blood is assum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stuart McGill
Stuart McGill is Distinguished Professor Emeritus of Spine Biomechanics at the University of Waterloo. In 2019, he was named a member of the Order of Canada The Order of Canada () is a Canadian state order, national order and the second-highest Award, honour for merit in the system of orders, decorations, and medals of Canada, after the Order of Merit. To coincide with the Canadian Centennial, ce .... Books *Back Mechanic *Low Back Disorders: Evidence Based Prevention and Rehabilitation *Ultimate Back Fitness and Performance *Gift of Injury References {{DEFAULTSORT:McGill, Stuart Living people Academic staff of the University of Waterloo Members of the Order of Canada Year of birth missing (living people) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The New York Times
''The New York Times'' (''NYT'') is an American daily newspaper based in New York City. ''The New York Times'' covers domestic, national, and international news, and publishes opinion pieces, investigative reports, and reviews. As one of the longest-running newspapers in the United States, the ''Times'' serves as one of the country's Newspaper of record, newspapers of record. , ''The New York Times'' had 9.13 million total and 8.83 million online subscribers, both by significant margins the List of newspapers in the United States, highest numbers for any newspaper in the United States; the total also included 296,330 print subscribers, making the ''Times'' the second-largest newspaper by print circulation in the United States, following ''The Wall Street Journal'', also based in New York City. ''The New York Times'' is published by the New York Times Company; since 1896, the company has been chaired by the Ochs-Sulzberger family, whose current chairman and the paper's publ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blog
A blog (a Clipping (morphology), truncation of "weblog") is an informational website consisting of discrete, often informal diary-style text entries also known as posts. Posts are typically displayed in Reverse chronology, reverse chronological order so that the most recent post appears first, at the top of the web page. In the 2000s, blogs were often the work of a single individual, occasionally of a small group, and often covered a single subject or topic. In the 2010s, multi-author blogs (MABs) emerged, featuring the writing of multiple authors and sometimes professionally Editing, edited. MABs from newspapers, other News media, media outlets, universities, think tanks, advocacy groups, and similar institutions account for an increasing quantity of blog Web traffic, traffic. The rise of Twitter and other "microblogging" systems helps integrate MABs and single-author blogs into the news media. ''Blog'' can also be used as a verb, meaning ''to maintain or add content to a blog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sit-up
The sit-up is an abdominal endurance training exercise to strengthen, tighten and tone the abdominal muscles. It is similar to a curl-up (that targets the rectus abdominis and also works the external and internal obliques), but sit-ups have a fuller range of motion and condition additional muscles. Form Sit-ups begin with the practicing individual lying with their back on the floor. Typically, this is done with the arms across the chest or hands behind the head. The knees and toes are bent to reduce stress on the back muscles and spine. Both the upper and lower vertebrae are elevated from the floor until everything superior to the buttocks is not touching the ground. Some argue that sit-ups can be dangerous due to high compressive lumbar load and may be replaced with the crunch in exercise programs. Performing alternative abdominal exercises to sit-ups actually increases the ability to do sit-ups. Performing sit-ups do not cause the spot reduction of fat at the waist. Gaini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lower Back
Lower may refer to: * ''Lower'' (album), 2025 album by Benjamin Booker *Lower (surname) *Lower Township, New Jersey *Lower Receiver (firearms) *Lower Wick Lower Wick is a small hamlet located in the county of Gloucestershire, England. It is situated about five miles south west of Dursley, eighteen miles southwest of Gloucester and fifteen miles northeast of Bristol. Lower Wick is within the civil ... Gloucestershire, England See also * Nizhny {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
