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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.
Rolling resistance, sometimes called rolling friction or rolling drag, is the force resisting the motion when a body (such as a ball, tire, or wheel) rolls on a surface. It is mainly caused by non-elastic effects; that is, not all the energy needed for deformation (or movement) of the wheel, roadbed, etc., is recovered when the pressure is removed.
Many definitions of joint manipulation have been proposed. [1] The most rigorous definition, based on available empirical research is that of Evans and Lucas: [2] "Separation (gapping) of opposing articular surfaces of a synovial joint, caused by a force applied perpendicularly to those articular surfaces, that results in cavitation within the synovial fluid of that joint."
Adapted physical education is a sub-discipline of physical education with a focus on including students with disabilities into the subject. [118] APE is the term used to refer to the physical education for individuals with disabilities that occurs primarily in elementary and secondary schools. [ 89 ]
The International Federation of Orthopaedic Manipulative Physical Therapists defines joint mobilization as "a manual therapy technique comprising a continuum of skilled passive movements that are applied at varying speeds and amplitudes to joints, muscles or nerves with the intent to restore optimal motion, function, and/or to reduce pain." [1]
Strength training, also known as weight training or resistance training, involves the performance of physical exercises that are designed to improve physical strength. It is often associated with the lifting of weights. It can also incorporate a variety of training techniques such as bodyweight exercises, isometrics, and plyometrics. [1]
A 2nd-century medical text by Antyllus, preserved in an anthology of Oribasius, Emperor Julian's physician, describes hoop rolling as a form of physical and mental therapy. Antyllus indicates that at first the player should roll the hoop maintaining an upright posture, but after warming up he can begin to jump and run through the hoop.
Isometric exercises were first brought to the modern American public's attention in the early days of physical culture, the precursor to bodybuilding. Many bodybuilders had incorporated isometric exercises into their training regimens. [12] [better source needed]