treadmill running or spinning - which is best for weight loss?

[okunka]

Any thoughts about which exercise results in quick weight loss? i also do once circuit class and one pump class a week.

spinning. i wear aheart rate monitor and burn around 500 - 580 calories per hour spin.

well surely it would depend on how fast you were running on the treadmill?

Running outside burns 10% more calories than on a treadmill.

i like spinning, more interesting then a tread mill and burns loads of calories. plus i hate running so not much of a choice for me

I think it's spinning.

spinning

The one you will stick at. Or probably a combination of all 3 so you don't get bored.

For me it would be a treadmill, as the spinning is so uncomfortable and unpleasant I know I wouldn't keep it up regularly, so Saggar makes a good point.