@truthnotfiction It is funny because it's the opposite of crossfit philosophy.
Except you are a top level athlete there is absolutely no reason to do this.
@anon103 That's not true, i spent 2h in zone 4 during my half marathon.
Max HR 197bpm, rest HR 52 bpm.
Run average 172 bpm, took with a garmin hrm pro plus
@jadex From experience people saying they can hold a conversation are no way holding a conversation (for beginner). They cut a sentence in 10 because they need to breath.
You never run as slow as you need and you think you are.