One reason a lot of people quit a routine is because of boredom. And who can blame them? It's tiresome to do the same routines week after week, month after month, even if you see progress and results. It is no small wonder, then, that most people are not able to stick with a fitness routine for more than a few months, no matter how motivated and well intentioned they are at the start of the process. It is, therefore, important to think about what your goals are month to month, week to week, and adjust your cycles or working out accordingly. This will not only keep you interested and fulfilled, it will also protect you from being injured, and enable you to blast through performance plateaus.
Goals for fitness can usually be cycled through phases, such as strength, followed by power, followed by metabolic conditioning. The strength phase will provide the participant with the ability to withstand the power training later on, and untrained and deconditioned individuals do not have a large a risk for overuse injury and burning out. Resting metabolism will rise, and athletic ability will improve with the power phase. This will get the participant to be more eager to move on to the next phase, which is metabolic conditioning, usually involving higher volumes of high intensity interval training (HIIT). With HIIT, participants can torch through their fat loss goals and turn their bodies into a much more effective energy burning machine.
These phases of training operate to sustain you throughout a long term lifestyle plan. The key word here is "training," which indicates long term adaptation and learning of different ways to maintain and improve your fitness. Month to month, week to week, or quarter to quarter, your body and mind will improve more steadily and you will remain engaged in the process for life!