![]() ![]() This forces the other (bigger) muscle fibers will take over. But as you continue to bust our reps, these muscle fibers start to fatigue. Initially you’ll only need to use a few small muscle fibers. So what happens when you lift a lighter weight? This is what is called failure the point where you cannot perform another rep. As a result, you cannot contract your muscle hard enough anymore to lift the weight. But after a few reps, the big muscle fibers are fatigued and cannot contract anymore. When you lift a heavy weight, all your muscle fibers are contracting to produce force. You cannot lift a heavy weight as many times as you would a lower weight. There is a drawback to lifting heavy weight compared to low weight though. ![]() Thus, lifting a heavy weight recruits many more muscle fibers than lifting a small weight.Īnd the more muscle fibers you use, the bigger the training stimulus is.īut does lifting a heavy weight always use more muscle fibers than a low weight? Weight Versus Reps So when you lift a low weight, you only need to use a few small muscle fibers.īut when the muscle needs to produce more force, more and bigger muscle fibers are needed. The more muscle fibers contract, the stronger the contraction of the muscle. These muscle fibers can contract to contract the muscle they are part of. In contrast, big muscle fibers produce a lot of force but fatigue fast. Small muscle fibers cannot produce much force but have great stamina. These muscle fibers come in different sizes, from small to big. Your muscles consist out of lots of muscle fibers. Muscles Work According the Size Principle Why are weight lifters so big then? Why are some of the biggest guys in the gym always busting out using high reps? Why are they bigger then you?ĭo you just need to be patient, or could it be, that really, you’ve been doing it wrong all along? Six to fifteen reps, that’s where it’s at for building muscle, everyone will tell you.
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