The sit-up is a strength training exercise. To perform it, a person lies down on the floor with his or her knees bent at 90 degrees, and then sits up without moving his or her knees. The hands are placed behind the head/neck or across the chest. It is intended to work the abdominal muscles, but it also utilizes the hip flexors and lower back. This imprecise targeting of the abdominal muscles has caused sit-ups to be replaced by crunches as the most common abdominal exercise. Many people do many sit ups each day in an attempt to gain a "six-pack", but abdominal exercises may need to be combined with some form of cardiovascular exercise such as running to lower body fat to allow the abdominal muscles to be seen.

The sit-up places considerable stress on the lower back vertebrae, so individuals who experience lower back pain should perform the crunch instead.

External links

• Sit-Ups Guide & Test
• Decline sit-ups exercise guide - How to do decline situps and other abdominal exercises
• AB Crunch - Effective Exercises
• Variations of the Sit-up

Weight training exercises

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