I recently started HIIT again.
Not going to lie: the first week was devastating, both physically and spiritually. I felt truly unfit for the first time in a very long time… something along the lines of, “I THOUGHT I WAS FIT FFS WTF IS THIS HOW AM I A TOTAL SHITTER???”
It is now the third week and I’m happy to report that my body has remembered what it feels like to be tortured.
All is right again in the world.