The push/pull/legs/upper/lower split is very similar to the Push Pull Legs split but instead of repeating push, pull, and legs you have an upper and a lower day. This just means that you have one less training day and it allows you to fit it all into a week if you're someone who likes routine. And each part is then trained on its own separate day. In the “push” workout you train all the upper body pushing muscles, i.e. the chest, shoulders and triceps. In the “pull” workout you train all the upper body pulling muscles, i.e. the back and biceps. And in the “legs” workout you train the entire lower body, i.e. the quads, hamstrings, calves. The uppers day combines both pushing and pulling and is a little bit longer. On the other hand, your leg days are a lot shorter as they are split up into two days (when compared to a traditional PPL split).