Just got laid off so have some time on my hands. Just started working out twice a day 1-2 days out of the week, and I work out about 4 days a week. Now I know, people say this and that about working out twice in a day how its not effective, but again I have free time.
My question is for people that do, is it better do work on the same muscle groups in the evening that I did in the morning or switch it up? Like if I do back/shoulders in the morning, should I do it again or do something like bis/legs or etc.