I've started having very strange issues when cycling and running, namely my hands, toes and feet (to some extent) get tingly or go numb after about 40 minutes of either running or cycling. This is really affecting my ability to do both of these things, which is upsetting, especially cycling since control of the bike handlebar is very important and sometimes I have to stop to let the numbness subside before starting up again. I don't have any other medical issues and have been to multiple doctors to figure this issue out, but no diagnoses have been made. I went to a Sports Doctor and this guy was stumped. He also looked at both my running and cycling shoes and that guy found nothing. The weather has nothing to do with it and I get this even on the hottest days in the summer.

wondering if anyone on here has had this (not with just cold weather, obviously) and if so what causes it.