What are some ways to quantify growth as a developer?

I’m an avid gym goer. As such, I spend a lot of time tracking my progress. With weightlifting, this is done by comparing metrics such as weight lifted or bfp week over week. In addition, you can experiment with diet and training regiments and see results physically. This tracking is super helpful In achieving goals

I was wondering if there was a way to bring this same sort of progress tracking system into development. As of now, I feel I am only able to “feel out” my growth, but I have no real quantifiable way of understanding it. Of course the disciplines are different, but I thought there must be some way to track my experience in order to concentrate my effort more efficiently.

What, if any, are some ways you track growth as a developer, and how do you use this to reach your goals?