The shape and thickness of legs are actually related to heredity, but running can definitely exercise leg muscles.
Some people are particularly afraid of thick legs after running. In fact, this is true, because I have been running. You can measure your size with a ruler. In fact, after running, your figure will not change much. The smaller the muscles, the stronger the vision. Relax your calves after running, because your muscles are congested after exercise. Just like before a bodybuilding competition, athletes have to make their muscles bloodshot before they have a big tendon.
Then we'll talk about muscles. This has a lot to do with stretching. Whether to stretch after running must be ...
It's a little scary to grow muscles at the beginning of exercise. At this time, some muscles are hypertrophy, but after long-term running and full stretching, muscle fibers will become more and more compact and slender. I wonder how long it will take. Depend on sb.
My coach told me that I was in a period of muscle hypertrophy ... but I could feel the contraction of gastrocnemius and soleus muscles in my calf. Anyway, it's the strongest, but I haven't exercised for a month. If I don't run, I will shrink back. Either my dimensions have changed or I look thinner, but I will stick to it. The ideal muscle is small and refined, not bulky and swollen like a bodybuilder. This requires long-term practice.
In fact, the thickness will not change much, but the shape will change.
In the end, I just stopped doing it for long-distance running and sprinting. ...