You burn more calories during your workout. You burn more calories following your workout. You will increase lean body weight. PACE training can produce lean muscle weight gains of to 1 pound per week. Yes, and that new muscle weight will replace that old fat weight.
Muscle is active tissue that burns a lot of calories and takes up less space.
Many people report that after using PACE their weight does not change much, but all of the sudden clothes they haven't worn in age's slip right on. I haven't worked-out in years. Remember PACE automatically adapts the workload to your level of fitness. As you begin to fatigue, the resistance decreases. Sooner or later all exercises get boring.