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The crunch or curl-up is an abdominal exercise that works the rectus abdominis muscle. [1] 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 [ like whom? ] , despite negative research results [ citation needed ] , as a ...
Abdominal exercises can also be performed with the help of some machines and the captain's chair is one of the most popular machines used in gyms and health clubs. Other machines are the Ab Roller, the Ab Rocket Twister, the Chin-up bar in conjunction with Ab Straps, and the Torso Track. An exercise ball is also a tool that helps strengthen the ...
Major variants: reverse ~ (curling the pelvis towards the shoulders), twisting ~ or side ~ (lifting one shoulder at a time; emphasis is on the obliques), cable ~ (pulling down on a cable machine while kneeling), sit-up ~ (have [chest] touch your knees), vertical crunch (propping up to dangle legs and pulling knees to the [ chest] or keeping ...
On Zinkin's machines, the weight lifted was selected by inserting a pin into the weight stack; moving the pin took only a few seconds. Zinkin marketed his machines under the "Universal Gym" trademark. They proved highly successful. He sold several custom-built units, and in 1963 began mass production. [2]
Bally Total Fitness acquired Crunch in 2001 for $90 million in cash and stock, [14] holding the brand for four years. In 2005 Angelo, Gordon & Co., a private equity firm, purchased Crunch from Ballys for $45 million, and in 2009 added New Evolution Fitness Company ("NEFC"/New Evolution Ventures), a company founded by Mark Mastrov (founder of 24 hour fitness) and fitness Veteran Jim Rowley, as ...
A weight machine is an exercise machine used for weight training that uses gravity as the primary source of resistance and a combination of simple machines to convey that resistance to the person using the machine. Each of the simple machines (pulley, lever, wheel, incline) changes the mechanical advantage of the overall machine relative to the ...
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