If you need to mix up the workouts to fit your schedule better, that's fine! If you are participating in the Muscles & Macros Challenge, it may be better to keep them in order so you feel like you are on the same schedule as everyone else, but that is up to you! When the Challenge is over and we go back to our regular muscle grouping schedule, some weeks have both glute day AND leg day - I definitely suggest separating the muscle groups when that is the case.
