Not enough. You get all the red meat out of your colon and some dehydration going, you will be down to 297 in no time.

Here is some Thinspiration for you, courtesy of Google Image Search.




Since yer fat, you should spend some time on a rowing machine. It would give that back a light work out and be low impact on your knees. You are 120lbs from an elliptical helping to tone up your arms.