Hello, I have been of late trying to get myself more fit and I have noticed the get off the floor with no hands exercise. I can get into what is called the 90 90 position which is one leg bent back at 90 degrees and the other leg the same but in front of you. I have seen pics. etc of people sitting like this then raising them selves up onto their knees but I cannot do this. What must I do to be able to do this. Thank you all for any help.