No one carries the DogBoy
Join Date: Feb 2004
Location: Upper Midwest USA
Posts: 2,320
Bikes: Roubaix Expert Di2, Jamis Renegade, Surly Disc Trucker, Cervelo P2, CoMotion Tandem
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I find this interesting conversation. I've been using my Garmin to estimate caloric deficit and it has been fairly accurate in predicting weight loss.
My Daily metabolic rate is somewhere around 2100 calories and so is my diet. Garmin tells me I burn about 1300 kcal/hr. This is average between climing/flat/windy/calm rides, and my avg HR is typically around 155. I consume about 220 kcal/hr in food/drink while on the bike in addition to my diet plan. So now I take a look at a typical week. 1.5 hr ride on Monday, 2.25 hr ride on Wed, 1 hr ride on Thurs and 6 hr ride on Saturday.
My net kcal (a/t Garmin) is 1080 per hour, and my weekly total is about 9-10 hours. That's 9720 to 10800 cal deficit per week. If I assume 3500 kcal/lb, I should be losing 2.7 to 3 lb per week.
I've been doing this for 11 weeks. My total weight loss to date? 33 lbs.