Finally, Phase four, "Maintenance", is a variation of Phase 3 with the person varying their diet seasonally and monitoring their weight and fitness to keep the weight off. This is described by many as the hardest aspect of the plan, but supporters argue that this is no different than any other diet plan where successful weight loss has occurred. | Finally, Phase four, "Maintenance", is a variation of Phase 3 with the person varying their diet seasonally and monitoring their weight and fitness to keep the weight off. This is described by many as the hardest aspect of the plan, but supporters argue that this is no different than any other diet plan where successful weight loss has occurred. |