Today (my 59th birthday) one of my long-standing suspicions has been proven to be true: Fitness Age is BS.
I've had my Forerunner 255 for about 10 months, so this is the first birthday I "celebrated" with it on my wrist.
In the months that I have used it - I really love it, overall - I have obsessed about the Fitness Age (FA) results each day, and even as the day goes on, observing changes, what changes it and why.
Poor night sleep? You just got 6 months "older."
Several days on a row of intense workouts? You might drop a year.
In the past 2 weeks, my FA has been fluctuating from 54 in the morning to 52.5 by the evening.
What was I doing during the day to drop 18 months off my FA? Damned if I know. The same thing I do every day: I exercise, eat my meals, and go to sleep.
So how do i know the FA is BS?
This morning, my FA showed 54 as it has for several days.
Just as I noticed that my calendar age in the app changed from 58 to 59, my FA changed from 54 to 55.
What?
Am I now a year "less fit" than I was yesterday because my calendar age jumped a year?
Truth is, I always knew the FA was BS, but I thought (hoped?) it was rooted in some sort of logic.
This proves that it is not.
