Split training is a training structure in which individual muscle groups or body regions are divided across different training days, instead of training the whole body in every session. Typical variants are the upper-lower split with two different training days, the three-day split by muscle group, and the push-pull-legs split, in which pushing, pulling and leg-focused exercises are separated. The advantage of a split is that more volume and attention goes to fewer muscle groups per session, so individual areas can be challenged more specifically.
By comparison, a full-body plan trains the whole body in every session with fewer exercises per muscle group, which makes particular sense for beginners and when there are few training days per week.
Relevance for training and nutrition
Whether a split or a full-body plan makes more sense depends mainly on the available training frequency and on experience; an overview is given in the section training plans. With a split that has high volume per session, the need for sufficient recovery and energy between the training days for each muscle group increases, and a protein intake matched to needs and spread across the week supports this recovery. It is also important that each muscle group is trained often enough over the week despite the division, otherwise a split that is too narrow can slow progress rather than promote it.
