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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 muscles have many important functions, including breathing, coughing, and sneezing, and maintaining posture and speech in a number of species. [4] Other abdominal functions are that it helps "in the function of support, containment of viscera, and help in the process of expiration, defecation, urination, vomiting, and also at the time of childbirth."
There are several variations besides the common push-up. These include bringing the thumbs and index fingers of both hands together (a "diamond push-up") as well as having the elbows pointed towards the knees. These variations are intended to put greater emphasis on the triceps or shoulders, rather than the chest muscles. When both hands are ...
As a trainer, I know that achieving a leaner belly involves more than just crunches and sit-ups. Total-body workouts that engage multiple muscle groups burn calories and increase overall strength ...
A sit-up, on the other hand, has a larger range of motion and targets multiple muscle groups at the same time—rectus abdominis, hip flexors, transverse abdominis (deep core muscles), obliques ...
Sit-up form. 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 target the rectus abdominis and also work the external and internal obliques), but sit-ups have a fuller range of motion and condition additional muscles.
Learn crunches benefits and muscles worked, how many crunches to do a day, and how to do crunches to lose belly fat and avoid neck pain. Crunches are a popular core exercise. Learn crunches ...
The linea alba is a white, fibrous band that is made of the bilateral rectus sheaths that join at the anterior midline of the body. These enclose the rectus abdominis muscles (a pair of long, linear muscles, commonly called the “sit-up” muscles) that originate at the pubic crest and pubic symphysis, and extend the length of the body’s trunk.