Join Date: Aug 2009
Bikes: 2011 Felt F3 Ltd, 2010 Trek 2.1, 2009 KHS Flite 220, 1991 Bianchi Osprey
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At 3500 calories/pound, 67000 calories is less than 20 pounds. Sadly, its easy to increase intake by a similar amount and not lose too much weight.
Weight loss takes sustained excess calorie burn, which includes both the exercise and the diet control. As to the latter, it's probably more important what you eat than how much. Beware of all processed foods. Just because you ride 50 miles a day doesn't mean you can wolf a bag of tortilla chips.
Oh yeah, and Garmin and other cyclocomputers are completely untrustworthy counters of calories burned.