Maintenance Requires Vigilance Gail Kolata's article on the Ultra Thermo Keto Biggest Losers received over feedback, a few from people who have succeeded in maintaining the weight off. They had a commonplace theme: constant vigilance. These human beings pronounced that they keep close song of their weight, they may be extremely careful about how they eat. They are relatively selective of their food choices. They workout often. They tolerate feelings of hunger among food.