Move your As$! The FIT Challenge

Looking to the journey of starting a business, reminds my that, somehow we have a FIT challenge. And, by fit I mean:

Stage 1- Problem - solution fit
Stage 2- Product - user fit (niche)
Stage 3- Product - market fit (scale)

Yesterday, I had the chance to know the "new": community - market fit with.

Bottom line: are you moving yourself enough to stay fit?

Question: what is your favorite "workout" to stay fit, taking into account the growth stage of your startup?