I ran 12mph on the treadmill for 40 minutes, How many calories do you think I bu!
Question: probably about 600 calories or so
Answers: probably about 600 calories or so
If you can run 8 miles in 40 minutes you should be in the olympics.
There is no real concrete answer for your question, as everyone's metabolism is different, therefore each individual burns calories at a different rate than another. I'm no doctor, but it's been proven statistically.
Congrats on being fit though =)
Enjoy your weekend.