The 3 Day a week fullbody workout schedule makes the most sense for most people when it comes to strength training.
This is due to it being easier to commit to 3x a day compared to say 5 or 6, as well as the fact that you are working the body together as a whole each time.
Now this isn't the only way to train, but for most people, especially those newer strength or resistance training, you can't beat it!
Much love,
Bryan Bell
Conscious Fitness