You are reading a single comment by @Dexter 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.
Dexter
If your upper threshold HR is around 175 then z2 (steady endurance) will probably be between 120-145 approximately.
Basically you should be able to hold a conversation at that intensity without struggling for breath.