i know of a trainer that did this for a new group and a few corporate groups. It works just like any other training regiment. The person who is not "READY" to embrace a better lifestyle will fail and those who are ready will succeed.
Her advice to her clients:
- surround yourself with positive people and rid yourself of negative parasites
- be ready for the change... it is not good enough to simply go through the motions. You must embrace the new lifestyle.
- be consistent
The biggest loser workout protocols are nothing close to being great. It is simple cookie cut stuff. The people who changed where those who accepted the challenge and stayed consistent.