I wanted to open the splits so I had that idea where I sit on my computer and, while facing the computer on the computer chair(the one which has hand-rests and goes circular) and put my right leg in the circle of the right hand-rest and put my left leg in the circle of the left hand-rest so they would be holding my legs still. Now this position is easy for me and doesn't hurt at all so I try to move forward a little so it gets wider and put a pillow beside me to not go backwards. I did this for 2 days and stayed like that, while using the computer, for hours(2-4 maybe) and I felt that it was a good excersice and didn't hurt that much(actually after I came off, it had this little "can't move legs freely" after any splits and that feeling lasted for like, less than 5 minutes) so I have no problem with staying like that, but I was afraid it might be harmful especially that everyone says you should do the splits for 30-45 seconds and max I've read was 5 minutes. So is this harmful or not? If harmful, what to do? If not, is it useful?