I am a 51 year old non-competitive guy trying to run triathlons to stay healthy. The formulas say my max heart rate should be around 170, and despite the myths, I think that number is good for me. When I hit that rate, things start to get uncomfortable.
Given that I am doing this for health, and I am non-competitive honoring that 170 mark is right for me. So If I hit the 170 (I have an alert on my Garmin) what should I do? Mostly I hit this on the run. I do not worry about it too much on the bike as there are few hills where I ride.
Currently my plan is to, when I hit 170, to slow down to a "lineman's shuffle", that is run like a 16:00/mile pace, just over a walk. I do this until my heart rate is down below 155, around 85% of max. After that I can pick up the pace again.
Does that sound like a good plan?