To do sit-ups, lie on your back, bend your knees and place your feet flat on the ground. Cross your arms over your chest, and tighten your abdominal muscles to lift your upper body off the floor until your elbows touch y... More »

www.reference.com Health Fitness & Exercise Exercise

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. More »

www.reference.com Health Fitness & Exercise Exercise

Between 10 and 25 repetitions of sit-ups should prove effective for most people. The number of sit-ups one should do in a day depends on a person's physical strength and endurance level. More »

The number of sit-ups required to lose 30 pounds in one month depends on personal weight and the duration and intensity of the exercise. A 150-pound individual burns approximately 10 calories vigorously doing sit-ups for... More »

www.reference.com Health Fitness & Exercise Exercise

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 Mus... More »

www.reference.com Health Fitness & Exercise Exercise

According to Diet Health Club, the average person can burn 100 calories in about 1,000 regular sit-ups. That number can be increased by doing high-intensity sit-ups: However, Diet Health Club states that it is impossible... More »

www.reference.com Health Fitness & Exercise Exercise

It takes roughly eight hours of consecutive sit-ups to lose one pound. More specifically, a person can expend approximately 3,500 calories by doing sit-ups for eight straight hours. More »