They're actually supplement products which work by increasing your calorie intake through protein consumption in order to elevate your weight and supply muscle to your body. (bestmuscleup.com)
The rest of the weight loss comes from increased calorie burn from the higher level and duration of intense activity that comes with fight camp over the other 5 - 9 weeks. (sbnation.com)
It's the process of slowly increasing your calories in an effort to restore your metabolism to its fullest potential. (coachcalorie.com)