I’m 64 female runner with first garmin since November . Completed 10 k training.resting hr = 58. Vo2 =37. Trying to do intervals tough and wondering if watch calculation of max hr is accurate because I really struggle to get above aerobic zone based on maximum hr assigned by watch of 186 bpm. The easy zone feels right at 110-130. The aerobic zone is comfortable to comfortably hard. With lactate threshold of 157, it’s super hard to get any anaerobic training
the online maximum heart rate calculations give a much lower maximum hr, and I’m wondering if my maximum hr is really lower. Instead the watch has over time gradually increased my maximum heart rate to 186. Has anyone else my age had these issues? I really need to become faster and do more interval work, but I can’t get my heart up that high.