Originally Posted by
spdracr39
The exercise is causing a flare up of restless leg syndrome and you are bruising your legs at night while sleeping then seeing it when you disrobe from your ride.
Oh my I think you're right. After reading up on it, it seems legit. I get those EXACT twinges + Iron deficiency and genetic pre disposition!! Thanks @
spdracr39 !! I think you've solved the mystery