sit-ups on floor

Sit-ups on floor is a popular exercise for developing strong abdominal muscles. To perform this exercise, lie on your back on a mat with your knees bent and feet flat on the floor. Place your hands behind your head with your elbows pointing out to the sides. Contract your abs and lift your shoulder blades off the floor, bringing your chest towards your knees. Exhale as you crunch up, and inhale as you lower back down. It's important to keep your neck relaxed and avoid pulling on your head with your hands. The movement should be initiated by your abs, not your neck or back. Aim for 2-3 sets of 10-15 repetitions. You can add intensity to the exercise by holding a weight plate to your chest or increasing the angle of your legs by extending them in the air.