Running uses your glutes, quadriceps, hamstring and calves constantly, meaning that your leg muscles are working and this will cause them to develop and get bigger in size. Any form of exercise that engages your muscles will cause them to grow in size.

Does running make calves bigger?

Strong calves help you to run faster. If you have slim calves and take up running, you will likely develop muscle, which will make the calves bigger. On the other hand, if you are carrying extra fat when you start a cardio fitness plan, such as running, then your calves may reduce in size.

Why does running make my calves bigger?

Running uses your glutes, quadriceps, hamstring and calves constantly, meaning that your leg muscles are working and this will cause them to develop and get bigger in size. Any form of exercise that engages your muscles will cause them to grow in size.