I hear some fitness organizations boast that they “never have their clients do the same workout twice,” while other reputable organizations promote using periodization training to create adaptation in the body, followed by the shock of change in the next phase. I get confused over which method is better, or if it’s a combination of the two ideas that works best.
Are you asking what is the most effective way to change one’s body composition?
One has to question what is being lost, muscle or fat?
Of the objective is to change body composition by reducing the amount of adipose tissue, then one would need to increase the amount of resistance training they would be engaging in, in addition to engaging in some aerobic training.
It is rather difficult to say what is “best” when one doesn’t know who the subject is. What is best is subject to one’s level of conditioning.