According to the literature to date, it appears that you should order exercises based on your current strengths and weaknesses , which muscle group you are prioritizing that day, and how important the exercises are to you and your goals. The most important exercise(s) should be done first in the session. Consequently, larger muscle groups don’t have to be trained before smaller ones. For example, you might choose to target smaller muscle groups first, if their development is lagging. Trainees get superior results for the exercises which are done early in a session.