Door Wedge
Using a conventional door frame, lift body as high as possible, while wedging knees and back in the frame.
1
Stand sideways in a doorway with a sturdy door frame.

2
Grasp top lip of door frame with both hands.

3
Rest back flat against frame and put one foot on opposite side of frame at knee height.

4
Lift body using arms and position second foot above the first on the side of the frame.

5
Pull yourself up as high as possible whilst tucking in your knees and raising them as high as possible.

Notes
Check that the upper surface of the doorframe is free from splinters and obtrusive elements, such as cables and tacks.