I can suggest some guidelines for determining the best days of the week to exercise:
1. Consider your weekly schedule: Choose days when you have free time and won't be too tired from work or other commitments.
2. Allow for rest days: Alternating between exercising and rest days allows your body to recover and prevents burnout.
3. Make it a routine: Pick the same days each week to help establish a routine and make exercise a habit.
4. Schedule in advance: Plan ahead to ensure that your exercise days stay consistent even if your schedule changes.
5. Listen to your body: Pay attention to how your body feels and adjust your exercise schedule as needed.
Ultimately, the best days of the week for exercise are the days that work best for you and your individual schedule, preferences, and physical needs.