Originally Posted by $0.00/Gal
Yeah I always told that riding at a racing pace for 50 or so miles will burn 600-900 calories. I know that Tour De France racers burn an average of almost 6000 calories per day, and that's an average between 120 mile days and 10 mile time trials. 3000 calories burned by even an enthusiast seems insane.
this is totally different based on your age, fitness level, wattage output and weight.
i wear a HRM sometimes when I ride, and 45 min on rollers at ~166bpm is about 600 cal for me. 20 mi this AM at 19mph average was 950. for me, 3000 cal would be about 65 mi at my normal pace.
if you really wanna know what you're burning, i recommend a HRM. they're pretty accurate.