Its not full rest between sessions its rest between hitting the same bodypart again. Like i do upper lower split 4x per week monday tuesday thursday friday, which gives my bodyparts the 48+ gap between sessions.
Sorry yeah, I think i got what you meant. I don't really rest anything, every session I hit every body part. I'll tend to go ro the gym Mon/Tue, rest Wed as my daughter comes over, PT Thursday, gym Friday, daughter/rest Saturday and then gym Sunday and do all that list every time.