Everyone should consider varying their exercise routines for two fundamental reasons: (1) to prevent or delay reaching a plateau in workout performance, shocking the body into further development and (2) to prevent boredom associated with doing the same regimen workout after workout, week after week.
Adding variety to an exercise program can improve adherence and can also help you stay physically challenged and mentally stimulated. The body will most likely adapt to a repetitive training stimulus within approximately four to eight weeks. Modifying your exercise routine will help avoid a plateau.
There are several ways you can spice up your current routine in order to stay enthusiastic and excited about your workouts. You can boost the intensity of your workouts by implementing the intensity principles outlined previously in this book. You can vary the exercises themselves, the order in which you do them, rest periods, rep ranges and rep tempo.