This happens because as usual people far oversimplifying things. For the most part it balances out, or actually helps taller people. Your thinking a little backwards. Your looking at the weight instead of the muscle. The weight is applying a force, the muscle is doing the initial work to move the weight. So if you reverse your theory it takes less muscle work to move more weight. Similar to using a long wrench to apply more force.
But then you have to think about where is all this force going, you have the muscle and the weight so now there is a certain amount of pressure hitting the bone, as well as the muscle isometrically to keep aid the bones. I’m sure as you learn more physics and calculas you’ll be able to see how much force can hit the bone at any point.
Long arms proportionately means the bar has to travel a shorter distance, but that distance is generally where the hips are so whether are not its easier depends on your hip strenght more or less.[/quote]
Ummmmm… This is just wrong. Maybe in the bizarro world where everything is ass backwards. If you are going to look at the physics of lifting, TWO things matter. The length of the segments and the muscle insertions. A longer limb will ALWYAYS mean that a greater force is being applied to both the muscle and weight being lifted, except at zero degrees (vertical). The insertion can matter just as much, and acts like a fulcrum sort of and in a simple sense decreases the length of the limb.
If you had two individuals with identical insertions, but one had an arm that was twice as long, that individual would have to exert twice as much force on the same weight being lifted.
It gets much more complicated than this is you want it to be, with inverse dynamics and accelerations, but it doesn’t need to be for what your are trying to understand.
Yes, taller individuals must exert more force to lift a similar weight usually. A 5’8 250lb guy will tend to be much stronger than a 6’8 250lb guy. But training changes things, like your strength curve, and rate of force development, and this is why even tall guys can lift a lot of weight with training.
I’d speculate that part of the reason a lot of WSM competitors are tall, is that a lot of their events have to do with deadlifting, Power, and isometric or supporting strength. I dont know a ton about WSM but if you are lifting those heavy ass stones, longer arms, and a greater height will definately help a lot.