Join Date: Oct 2003
Location: SE Michigan
Bikes: '03 Litespeed Blue Ridge; '04 Litespeed Solarno; '12 VooDoo Nakasi
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It depends on what you want to do while you are exercising. I'm in a program at the local Lifetime gym that teaches you the different zones your heart rate is in and what they are doing. My AT (ananerobic threshold) is around 160, when you start having trouble talking. From 144 - 160, Zone 3, I am burning more fat than sugar. Below that, Zone 2, I'll burn equal sugar and fat. Above 160 - 174, Zone 4, you'll start burning more sugar than fat, and Zone 5, above 174 it is all sugar. It is very hard to stay in Zone 4 or 5 very long, but necessary once in a while to push yourself. It shocks your system which forces your body to improve performance to handle it. If you are looking for weight loss and long endurance, work out within 5 of your AT most of the time.
I'm not an expert, just relaying what I remember from the class. I believe your 190 is in Zone 4 or 5. How long can you stay there? I'm 38 and ride 50 miles a week in the winter and over 100 in the summer. My AT will increase as I get in better shape toward spring, but I doubt it will climb above 170.