https://www.metrotimes.com/detroit/perfect-amino-reviews-is-advanced-bionutritionals-perfect-amino-safe-and-effective-any-side-effects/Content?oid=26756942 You should never attempt to cram more than three muscle-building workouts (four at the very most) into a single week. If your workouts are providing an appropriate challenge, then your body is going to need restful periods to repair and recuperate in between exercise sessions. Too much exercise may cause injury and that can be counterproductive. If your training regimen has reached four days weekly, then try to avoid having more than one pair of consecutive down days. Your body will build and recover better with the down days spread out. If your life and schedule make this impossible, do not lose any sleep over it though, as you are still working out four days a week.more