I'd agree with that. A 3 hour bike ride in a moderately hilly area burns about 2000 calories, and that's a considerable number to bank. My lowest weight --and c

I'd agree with that. A 3 hour bike ride in a moderately hilly area burns about 2000 calories, and that's a considerable number to bank. My lowest weight --and counting calories ruthlessly-- was when I was running regularly, even at just 2 or so miles, until my knee started giving me trouble.