BPM importance
I've been running consistently for 3 months now, pretty much 4-5 times a week every morning. I usually do 3-4 miles a morning between 4.5 to 5.2 mph. The one problem im seeing is that there isnt a change in my BPM's ability to stay at the optimum fat burning percentage. Pretty much to stay around 130 bpm i'd have to crawl on the threadmill at like 4 mph, if i push it to 4.5 then ill rocket to 160-170 and stay there if i exceed 4.5.
Two questions are why is my heart not adjusting to the months of running i've been doing? i figure my bpm would gradually drop the more consistantly i run? secondly, how important is it to stay at the fat burning percentage level? I've searched the net but could not find any articles explaining the science behind exceeding that level in the BPM wont be optimum in burning fat
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