HOW: Lift your head and arms slightly off the bed and tense your abs at the same time. This is a static exercise so just hold the position for as long as you can. Try counting to 50. If you managed that then either rest for a few seconds and do another set, or keep counting until you reach 100…or more.
The feeling as you relax after this exercise is unbeatable. You will feel totaly relaxed and can go to sleep knowing that you ended the day on a high note.