
Calves are a Type II muscle fiber, which means they are the same as your abs and forearms. Could you imagine having big abs? That would be awkward. When you think of the natural use of these muscles, it makes sense why they are structured as they are, because they perform so much action. Calves are walked on all day, so coming into the gym and doing 200 reps of light weight with them, as most people do, will not cause them to grow. You are just stimulating them just as they are used to. So, to make calves grow, it is an issue of heavy weight first. Think about it, in order to achieve muscle overload and actually have calves grow, you have to have them do something they are not used to in order to improve themselves. That being said, first progressively hit calves heavy for a rate of ten to twelve reps.
After calves have reached the point where they can no longer hit heavy weight, now is when they are hit with high reps. The muscle is now overloaded and even a little weight, with a higher rep scheme will cause it to grow. That being said, not everyone can have monster calves, but using this formula, they can be improved upon.