There are elements in gymnastics, which you simply need to know, because they are an important component of a lot of exercises. One of this elements is for sure the pike.
My gymnasts of the club need to hold it for 2 seconds and with close legs on the parallel bars and the girls straddled on the beam. For everyday the pike is an excellent exercise to increase the supporting strength in the arms and you need of course strong abdominals.
To train the pike and the needed muscles, just put your hands on a hard bottom and lift your butt and legs until they are in a right angle – first with bended knees and if it’s to easy with straight legs. And then „just“ hold it!
Don’t be discouraged if it’s not working immediately, because only practise makes it perfect!