welcome, #63313! we are in the same ball park, i am 30, sw 245, cw 235, gw 160. i only just found this forum five days ago and the support here has made all the difference. i've never been able to fast for more than 2 days, but this forum has helped me to this my 8th day. have you ever fasted before? i recommend you do NO excercise at first, intake water/juice/whatever youre taking at regular intervals and PAY ATTENTION TO YOUR BODY. you'll likely go through some detox setbacks, but just listen to your body for any alarms. and come here to the forum to ask questions, someone here can answer it, or knows someone who can, or knows where to find the answer.