Ok. So I am guessing you are hitting between 145-155 Hr and that's good. I would say after losing 85 pounds (which is awesome) that you need to try a few things on the more aggressive side. 1. Get routine blood work and add these: ketones,dhea,B12 and cortisol. By doing this you can see if you are lacking anything major and possibly see if your adrenals are being overworked. 2. If the blood work comes back ok. Bring that cardio up to and over an hour at least 2 days per week. 3. Cross train on cardio but with something that keeps the HR up. Start walk/running or do a different cardiovascular exercise every other day. 4. You could bring the carbs up slightly in the 50-60 range.
I hope this helps and way to go on the 85 pounds!
Hope this helps.