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2

A question to an easier answer: Are you actually doing the push-ups with proper form-tension (stiffness of the bodyparts which do not move?) By which I mean the you should make your body stiff as a plank from the chest down. I don't think your knee-extensors are too weak to do push-ups, otherwise you wouldn't be able to actually walk. Don't navigate around ...


17

What you are describing suggests that your knee extensors, and particularly the single-joint quadriceps muscles—vastus lateralis, vastus medialis, and vastus intermedius—are weak. The closer that you are too the floor, the greater the moment produced at the knee. At 0°—that is, parallel to the floor—the moment is at a maximum due to the weights of the upper ...


1

Just do knee push ups The only thing that comes to mind which could cause your knees to hit the ground when you are actually supposed to touch the ground with your chest is that your abodomen is week and your spine collapses bending back, use a mirror by your side to see that. I suggest doing planks and knee push ups until you are able to do proper push ups....


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