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Sit-ups are the basic exercise that is used to strengthen the abdominal muscles. They involve laying flat and raising one's torso from the ground. Compared to abdominal crunches, sit-ups exercise many other core muscles.


According to Bodybuilding.com, crunches are preferable for those wishing to work their abdominal muscles and get them in shape. Sit-ups rely primarily on the psoas muscle that runs from the lower back to the front of the thighs; as a result, they do little to build the ...


Sit-ups do not contribute to the loss of belly fat and have a minimal affect on burning calories. It is not possible to target specific areas of the body for weight loss, such as performing sit-ups to achieve a flat stomach or to gain six-pack abs.


A person burns roughly 50 percent more calories standing than sitting, reports KVAL.com. An average person burns 107 calories per hour sitting. Results vary by size and metabolism, but a 155-pound person burns about 50 calories more per hour when standing.


There are literally dozens of different core exercises that can be classified as sit-ups. These include crunches, chinnies, jack-knife, straight-leg, weighted and Swiss-ball sit-ups, plus Russian twists. According to Muscle Prodigy, Janda-style, V-type and commando sit-...


Babies generally sit up independently between the ages of four and nine months. Before they can sit up, babies must have some degree of coordination and muscle strength.


Pet sitting is a service in which someone is paid to take care of another person's pet. It often involves things like the pet sitter coming to stay at the home with the pet while the owner is on vacation.