Sit ups are more difficult with the hands behind the head because there is no way for the body to push off the floor. When the hands are at the sides, it is automatic that the hands will help push the torso off the floor.
The challenge of not being able to touch your hands behind your back is limited flexibility and range of motion in the shoulders and upper body, which can make certain tasks or movements difficult or uncomfortable.
"I find it very difficult to write a sentence using truncheons instead of a pen." or -- less comically.... "They beat him severely, not with their hands, but instead with truncheons."
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He placed his hands on her sternum, and started CPR.
Hands
why is it difficult to charge a metallic conductor which is held with the hands ?why is it easy charged a non conductor although it is held by hte hands
fail...
The small of you back is in the middle just about level with your waist. So it means interlocking your hands behind you with your elbows slightly bent.