Tendon pain

I somehow try to relax, but I feel tension in my legs, especially in my calf tendons.

At this time, if you exert too much force, it suddenly starts to hurt.

The characteristic is that the calf becomes firm for a certain period of time, and the big toe is fixed pointing downward.

So, if possible, I tend to be conscious and exert proper effort.

But what would you call this kind of pain, and what is its cause?

I'm posting this because I'm curious.

Thank you for your interest and for reading the article.

Always stay healthy.