You are reading a single comment by @HatBeard and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@HatBeard
possibly just a case of you breathing in a lot of dust, I imagine gyms aren't thoroughly cleaned a lot and it probably only happens when you run as you tend to breath much heavier/deeper when doing high intensity cardio than most other gym activities?