
23. Sit ups
When doing a sit-up, your entire back has to leave the floor. It’s essential to keep your knees up with your feet firmly planted on the ground for this exercise. Place your arms on opposing shoulders, so your arms are crossed over your chest. That allows you a central rising point. Problems commonly experienced when doing sit-ups are rounding the lower back, not breathing throughout the movement, and trying to do the exercise too quickly, so you’re virtually rocking back and forth. Putting your hands behind your neck and pulling on it is a common problem. Another problem is pushing your head forward too much and pulling your chin into your chest.

To do a sit-up correctly, lie with your back on the ground with your knees bent. Draw your belly button into your spine to tighten your abs. Keep your feet flat on the floor and slowly lift your head and shoulders. Focusing your eyes on your knees, pull yourself up to your knees and hold your position. Slowly lower your head and shoulders back to the floor. A modification of the sit-up is doing it with crossed arms over the chest.