A THE FIX LAB TOOL
Find your walking zones
Enter your age to get your slow and fast interval heart rate zones.
Estimated max heart rate
185 bpm
Slow interval
3 min · 50–60% max HR
93–111
bpm
Full sentences, easy breathing.
Fast interval
3 min · 75–85% max HR
139–157
bpm
A few words at a time, not a sentence.
use the talk test instead
No monitor, no problem. Slow interval: you can hold a full conversation without thinking about your breathing. Fast interval: you can get a few words out, not a full sentence. If you can chat easily through your "fast" interval, it isn't fast enough.