ABDOMINAL CRUNCHES WITH ONE LEG IN STRAP
Set resistance on on maximum level. One end of the strap is attached. One foot is suspended in the other end. The free leg is moved in parallel.
In supported position, the legs form a straight line with the spine. Maintain body tension and do not arch your back. You should be looking at the ground.
Pull the knee below the chest, as far forward as possible. The back arches upwards. The entire body curls forward. Keep shoulders firm and tensed.
Switch the leg in the loop.
The further you move from the wall, the more difficult the exercise becomes.