Training Splits: Full Body, Upper/Lower, or PPL?

Research points to two anchors: train each muscle at least twice per week, and accumulate roughly 10-20 hard sets per muscle per week. A 2016 meta-analysis found training a muscle twice weekly beat once weekly for growth — the classic one-muscle-a-day 'bro split' fails this test.

Every good split is just a different way of hitting those two anchors with the days you have available.

With two or three sessions a week, full-body training is the clear winner — it's the only structure that hits everything twice or more. Each session centers on a squat pattern, a hinge, a push, and a pull, plus one or two accessories.

Full body is also the best beginner structure regardless of available days: high frequency on the main movement patterns is how technique gets learned fast.

Four days splits naturally into upper/lower run twice — every muscle twice weekly, with more time per session to push volume than full-body allows. It's the workhorse split for intermediates and arguably the best balance of frequency, volume, and recovery available.

A useful variation is running one heavy and one lighter day per half: heavy upper, heavy lower, hypertrophy upper, hypertrophy lower. Same split, built-in intensity management.

Push/pull/legs needs six days to hit everything twice, which demands consistent recovery — sleep, food, and stress all in order. Run at five days it rolls muscles to roughly 1.7x weekly frequency, which is workable but no better than upper/lower at four.

Whatever you pick, keep it for 8-12 weeks before judging. Program-hopping resets the progression that makes any split work, and the differences between sensible splits are far smaller than the difference consistency makes.