I’m wondering how to determine my max heart rate for the purposes of working out. I’ve tried the formula most often cited on the internet (220 minus your age in years), which tells me 158 is the max for me (I turn 62 in 6 days) and seriously doubt the accuracy of that internet derived formula.
The context for my question is a little convoluted. I’ve always stayed pretty active daily but less so in winter. I bought an Apple watch with heart monitor and wear it ice skating, with 1-hour hard skating sessions every other day. Generally, I am in the 150 range pretty consistently (95% of theoretical internet derived max) and do not feel like I am working excessively hard in that range…it feels very do-able and normal. Today I hit 161 for a while when I was intentionally working extra hard which is 102% of max (???). I know for sure that I work much harder than that during hockey games when I am not wearing the heart monitor. However the usual doctor advice for a 62 year old is to limit yourself to 85% of max.
Not sure how to proceed if it turns out my max heart rate is much higher than 158 (as I suspect) or possibly if it actually is 161 (does that mean I am risking a heart attack when I skate?) Do I set up an appointment at my doctor for a treadmill test or ???. How does one determine a max heart rate and what does one do with that knowledge once it is known?