Funny you should say that but eventually I was "forced" onto the "bike".
I actually enjoyed the beep test as a 40+ old as it was nice watching all the sprogs stopping short as they couldn't hack their levels, levels that I was able to push myself to.
However the "bike" was another matter, absolute purgatory on the thighs, best bit was I used to cycle to/from work via Tentsmuir forest! LOL