I heard peoples such as powerlifters and bodybuilders, are always can leg press more than they can bench press and other forms of exercises. For example the record for the leg press is 2300 pounds by bodybuilder Ronnie Coleman, compared to the bench press record at 1250 pound. Here is the link showed Ronnie Coleman doing the 2300 pound leg press. http://www.youtube.com/watch?v=TSWbeWJyPcQ So that's mean that his legs are stronger than his arms? I don't think so. From what I've read from most websites, people can press heavier weights on leg press comparing to other exercises because the leg press stabilizes the lifter and moves weights in a direction that is not vertical. If we are going to using some physics, actually the angle determines how much each of these is. If the angle is 0 and the weight is sitting on a flat surface, the surface is providing all the force to keep it there when you disengage the locks holding the weight (how much force you need to push it across the surface depends on other stuff like friction which I won't get into here). If the angle is 90, that means the weight is hanging vertically, and that when you disengage the locks, you are going to be the only thing providing force to keep the weight off the ground. Therefore, using some formulas, leg pressing 2300 pounds at 45 degrees really means that you're only pushing: 2300*sin45= ~1626 pounds But I'm not sure if the angle of the leg press sled that Ronnie Coleman using is 45 degree, it's look like 40-30. And it seems that his range of motion is limited. Can someone give a more detailed explanation about this?