Hi guys/gals, I had a couple random questions on leverage and the human body. I am an active individual that enjoys lifting weights and working out. At the gym today, I got to thinking about the "mechanical advantages" that certain body types have doing particular lifts. First question is curling a weight, by utilizing the bicep. So my question is this: Is there a formula/animation/drawing to point to the advantages of a shorter arm (lever) when doing a curl. Remember, the weight is on the hand and you bend at the elbow. So therefore, it appears quite obvious to me that a shorter arm (bicep + forearm combo) can lift more, due to the decreased angle. With that question, can anyone show how a 1" further placement up the hand can create a harder lift? In other words, how much more "force" is applied when 50 lbs is moved up 1"? Second question is pressing (bench pressing) a barbell weight from the chest, moving upwards. Obviously (like above), a short armed individual will have less trouble moving the same weight as one with longer arms. Is there any math to back this up? I hope this made sense and is in the right sub-forum. Thanks for any assistance.