So yeah, please be careful when doing sports while sick.
Rule 1 of training as an athlete was: you do not train for N extra days after N days of fever
You do not want a heart infection.
Keeping track of you morning resting heart rate will tell you exactly what is going on.
According to https://www.myocarditisfoundation.org/about-myocarditis/:
> Men however are twice as likely as women to develop it, but women do develop myocarditis.
i was run in pine forest(it produces air with antibiotics), sub zero, down to -20c(in light clothes and sneakers).
for simple throat and nose conditions it was immediately healing, body temperature under 38c.
there rule was - never stop. nor walk. only run(until get to shower). or will get ill. tested few times.
in hockey people does not seem to run all time
also, i was run on frozen randomized ice pieces, dirt and snow like things. i had to adapt my posture for that, basically it does not streess same joints same way, not like thread mill or flat city roads. it was good. rule was never walk. when i started to walk, slipped to ground fast.