1.) The L-sit is one of the most effective abdominal stabilization exercises around. They are easier to train if you build yourself a pair of parallettes , but they can be practiced on the floor as well.

2.) Sit on the floor, back straight and in a neutral position, legs together and straight in front of you.

3.) Your hands should be placed next to your hips, flat on the floor, fingers pointing towards your toes.

4.) Press up off the ground and keep your legs at a 90 degree angle to your torso by contracting your lower abdominals and your hip flexors. Remember to breathe as normally as possible.

5.) Hold for as long as possible. It is best to quit if your form gets too sloppy, as this leads to diminishing gains and the possibility of lower-back injury.

6.) Rest an appropriate time and repeat until you’ve completed the required total time for the static hold.