Max Heart Rate

[Bengalbug]

So, the typical formula for max heart rate is 220 - age.

I am 32 years old, so it should be 188(ish). I usually play basketball once a week and routinely get my heart rate to 192-193. Tonight I played 5-5 and was shocked to see I got my heart rate up to 203. I know the apple watches are not full proof, but when I check against when I am working out on a cardio machine, it is usually pretty dang close.

Now I used to run marathons... 10 years ago.. and I do bike/lift almost daily 6-7 days a week. And tonight I could have kept playing, I didn’t feel the shakes or getting weak.

So what really is a persons max heart rate? It is going to differ for everyone, but should I try to not let 200+ happen again?

For what it’s worth, my resting heart rate is low 40’s and even high 30’s from time to time