Sit-up
Sit-up
A Sit-up (pronounced: /ˈsɪtˌʌp/) is a common calisthenic exercise performed with the aim of strengthening the abdominal muscles and the hip flexors.
Etymology
The term "sit-up" is derived from the action of sitting up from a lying position. It has been in use since the early 19th century.
Description
A sit-up is initiated by lying down on the back on the floor, typically with the knees bent in an attempt to reduce stress on the back muscles and spine, and then elevating both the upper and lower vertebrae 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 an exercise program.
Variations
There are many variations of the sit-up that are used to work different muscle groups. These include the crunch, the V-up, the jackknife, and the bicycle crunch.
Related Terms
- Crunch: A crunch is a form of sit-up where the range of motion is restricted to the upper abs.
- V-up: A V-up is a more difficult variant of the sit-up, where the arms and legs are simultaneously lifted to form a "V" with the body.
- Jackknife: A jackknife is similar to a V-up, but the body is folded at the hips instead of the waist.
- Bicycle crunch: A bicycle crunch is a dynamic variant of the crunch where the legs perform a cycling motion.
External links
- Medical encyclopedia article on Sit-up
- Wikipedia's article - Sit-up
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