Well, as I posted, 200 is pretty much an all-out effort for a fit person in their early 20s (max 30-60 sec). We all know max HR decreases with age.
Either these guys (or their equipment) are overestimating their HRs, or they're part of the small percentage of people with unusually high max HRs.
22 here, so that will definitely play into it.
Have had physician-certified "healthy' blood pressure (I can never remember what they tell me, if they even do...) my whole life, always have had a body temperature around 97.5 unless I'm sick, have always been lean (except for genetic disposition to fatty layer over ab muscles) and have always seemed to have a pretty rapid heartbeat in general. When I was out of shape, HR was a different story.
I wouldn't doubt if I end up having an unusually high max. And I also don't doubt gym equipment might be inaccurate (even if they are really nice machines). Not that it matters, unless such an unusual characteristic is more likely to kill me - then I really don't want it.
Doesn't help my dented chest has always made me really focus on my heart and breathing, judging if my chest indentation has led to any performance issues.
Docs have said I check out fine, but I don't typically feel like my lungs are efficient. I can run for distance when my body is up to it, but pace is a whole nothing story; Always in the low end of the accepted 2 mile run time. Sometimes I worry myself sick over little things and have had times where I let anxiety basically turn into an anxiety attack. Never been confirmed but I know myself well enough to reflect and figure, that's likely the case.