Start in a Supine plank position, with your fingers pointing towards your feet or to the side.
Slowly lean towards your head to put more weight on your arms and less on your heels.
Lean enough to make it challenging to hold the position for more than 15-20 seconds, but not so much that you're not able to hold it for more than 5 seconds.
This exercise can be good way to work on Shoulder extension backward without equipment and lead towards exercises like the V-sit and Pike forearms victorian .
Form tips
Push your shoulders down ( Shoulder retraction ), away from your ears.
Keep your legs straight.
Avoid craning your neck forward: keep it neutral, looking at the ceiling.