Hey folks,
This winter I want to help two friends that are dangerously over weight lose some pounds and start moving. Both are big guys, one is probably 5' 11", the other may be as tall as 6' 2", both are well over 100lbs over weight, with no significant athletic background.

All the BMR calculation stuff on the web seems to assume 'average' body composition, but I know I can't stick these guys on a 2k diet and expect them to do well, I'd like to be able to get a better idea of their caloric needs. Anyway, any help or advice would be appreciated.

thanks