Tracking exercise when using MFP with Fitbit

I just joined today and I read that you're not supposed to use Fitbit to track exercise. You're supposed to enter exercise manually into MFP by entering an exercise type and start time. Fitbit is just for daily steps, calorie burn and tracking sleep. Not sure I understand why. I wish MFP had the capability to track running and other cardio rather than having to log it after the fact. I like to use an app to track my runs as they're happening. I'm now trying to figure out if I can sync a different exercise tracking app with MFP. In any case, I can't use Fitbit to log my runs anymore, as it's now synced with MFP.

My Fitbit tracks steps per day, exercise, general moderate/intense activity, what I eat, and when I sleep. When I sync it with MFP I do my food journal on MFP and my exercise on Fitbit. But I also have a calories burn calculator. I run the exercise through that and if the calories are different then I edit the exercise in Fitbit.

This is the site that has the exercise calculator but it has all kinds of fitness calculators.

http://www.healthstatus.com/calculators/

I let fitbit track my activity. Then I go into the fitbit dashboard and log in the exercise start time and duration. It already knows how intense that was based on my stats. Then it adjusts my calorie allowance on MFP for me. Seems to be working well for me. I am still loosing steadily. The only thing I miss out on is that it does not show up in MFP on my home page for discussion with MFP friends.

There is a FAQ on this subject in the Fitbit group here.

Enable negative calorie adjustments and let your tracker do it's work.