Accumulator
Well-known member
How do you calculate max HR?
The 220- age and 207- 70% of my age both yield about the same number.
Ah, that`s the thing...I *DON`T* calculate it

There`s simply no proven across-the-board correlation between HR max and age, or at least I`ve never seen a study indicating one. Some people`s max diminishes but many (?most? at least in the case of those who train hard) don`t. Life-long trainers who keep track of such stuff have always said it doesn`t work out that way for them.
Note that the guy who came up with "220-minus age" has gone on record as saying it was merely a guesstimate that he used for the sake of consistency in a study focusing on other things. He never expected people to use it as an actual means of coming up with an individual`s actual max. I`ve always wondered why the idea has gained such widespread acceptance, figure it`s convenient and suspect that it gives a more doable target.
Strictly speaking, it`s not really about HR max anyhow, it`s about VO max, but it takes a lab setting to determine that.
Noting again that I think we`re just, uhm...discussing theoreticals on a topic we find interesting, having experienced really maxing out (as best I can tell), I know how that feels (basically "oh man, just live through this...gasp gasp") and I push myself to about that point. Being able to do that with short Work Intervals is what requires those fairly tough warmups I do.
Eh, the (very) few people I know IRL who do this stuff just don`t push themselves *that* hard on a regular basis and I`ll be the first to say that`s perfectly sensible and OK and they`re working plenty hard. IMO it`s understandable as going harder is simply brutal and invokes that "aversive effect" that can get folks to find excuses to not do hard cardio at all. Gotta say that I have to *force* myself to do those AirDyne sessions, utterly dread them...the Stair not that much but I know I`m not really working as hard on that.