According to my GPS/heart rate monitor I use up 1008 kilojoules for 90 minutes of cruising bike riding. Heart rate is hovering around 140 bpm so not really exerting myself.
That coincidentally is the same energy density as one Mars bar.
I think I got similar results last time I wore my GPS supping.
Just my two cents, exercise by itself will not cause you to lose weight. You cannot exercise away the results of too much junk food, pies and booze. You would have to be going hard all day, every day. It has to be mixed with sensible diet and, most importantly, portion control.
1 stubbie of heavy = 590 kJ = 40-60 minutes exercise
1 53 gram Mars bar = 1010 kJ = 60-90 minutes exercise
1 Big Mac = 2060 kJ = 4 hours?

1 Meat pie = 1800 kJ = dunno. I feel sick now. I might have some chocolate to cheer myself up.






