You decide you're going to get serious. You sit down to find a training program. Simple enough.
Forty-five minutes later you have fourteen browser tabs open, three Reddit threads arguing about the superiority of push-pull-legs versus upper-lower, a YouTube video from a bodybuilder who insists bro splits are dead, another video from a different bodybuilder who insists bro splits are the only thing that ever worked, and a growing suspicion that nobody actually agrees on anything.
So you close all the tabs, tell yourself you'll figure it out this weekend, and go watch something on Netflix instead.
If that scenario is even remotely familiar, this article is for you. Because the truth about training splits is far simpler than the internet makes it look, and the argument about which one is best is largely a waste of energy that could be spent actually training.
What a Training Split Actually Is
A training split is simply how you divide your muscle groups across your training days. That's all it is. You have a finite number of muscles to train and a finite number of days to train them. A split is the organizational system that determines what gets trained when.
Different splits exist because different people have different schedules, different goals, different recovery capacities, and different levels of experience. There is no universally optimal split. There is only the split that fits your life, serves your goals, and that you will actually follow consistently.
With that said, understanding the main options and what each one is designed for will help you make an intelligent choice rather than a random one. So let's go through them.
The Bro Split
One muscle group per day, five or six days a week. Monday is chest. Tuesday is back. Wednesday is shoulders. Thursday is arms. Friday is legs. The name isn't exactly flattering, but the structure has produced a lot of impressive physiques over a lot of decades.
The appeal of the bro split is volume and focus. You're dedicating an entire session to one muscle group, which means you can hit it from multiple angles with significant total volume before it gets a full week to recover. For bodybuilding-focused goals, that targeted stimulus has real merit.
The challenge for the 30+ crowd is the frequency requirement. Five or six days a week is a significant time commitment, and recovery becomes a real consideration as you get older. Miss a day and an entire muscle group gets skipped that week. For someone with a demanding schedule, that's a meaningful drawback.
Best for: Experienced lifters with 5-6 days available, primarily focused on physique and hypertrophy.
Push-Pull-Legs (PPL)
Push-pull-legs organizes training around movement patterns rather than individual muscles. Push day covers chest, shoulders, and triceps. Pull day covers back and biceps. Leg day covers quads, hamstrings, glutes, and calves. Run the three days back to back or with rest days in between, and repeat.
The elegance of PPL is that muscles that work together get trained together. Your triceps are already involved in chest pressing. Might as well train them in the same session. Your biceps assist in every back movement. Same logic applies. This reduces overlap and allows each muscle group adequate recovery before it's hit again.
Run three days a week and you hit everything once. Run six days and you hit everything twice. The flexibility is one of its biggest selling points.
Best for: Most people, most goals. PPL is arguably the most versatile structure available and works well for both muscle building and fat loss phases.
Upper-Lower
Upper-lower does exactly what it sounds like. You alternate between upper body sessions and lower body sessions. Run it four days a week and you hit each half of your body twice, with built-in rest days that make recovery manageable.
For men in their late 30s and beyond, upper-lower has a lot going for it. Four days a week is realistic for most schedules. The two-day frequency per muscle group tends to drive good hypertrophy without the recovery demands of higher frequency programs. And the structure is simple enough that you can be flexible about which days you train without the whole thing falling apart.
Best for: Men with 4 days available, anyone prioritizing recovery, and those newer to structured programming who want a simple, effective framework.
Full Body
Full body training means hitting all major muscle groups in every session, typically three days a week with rest days between. Each session includes a compound lower body movement, a compound upper body push, a compound upper body pull, and some accessory work.
The frequency advantage is significant. Every muscle gets trained three times a week, which research consistently shows is a strong stimulus for muscle growth, particularly for newer or returning lifters. The tradeoff is that volume per muscle group per session is lower than splits that dedicate entire days to one area.
Full body is also the most forgiving structure if life gets in the way. Miss one of three sessions and you've still trained everything twice that week. For someone juggling a demanding job and family commitments, that resilience matters.
Best for: Beginners, returning lifters, and anyone who can only consistently commit to three days a week.
So Which One Should You Choose?
The one you will actually do. Consistently. For months.
If you have four reliable days a week, upper-lower is hard to argue with. If you can hit six days and want to prioritize physique development, bro split or PPL six-day will serve you well. If three days is your reality, full body three times a week beats any other program you only partially follow.
None of these splits will work without the principles covered in earlier articles. A plan you don't execute with intention and progressive overload is just a schedule. Apply those principles to any of the structures above and you will make progress. That's not a guarantee. It's just how the biology works.
Pick a structure, commit to it for at least twelve weeks before evaluating whether it's working, and go hard at it. The best split is the one you stop debating and start doing.
Not Sure Where to Start? That's What Rep by Rep Is For.
If you read through all four of those options and still aren't sure which one is right for you, that's completely normal. The right answer depends on your schedule, your goals, your training history, the movements you actually enjoy doing, and the life you're trying to fit this around.
This is exactly what Rep by Rep coaching is built to do. Not hand you a generic template and send you on your way, but sit down with your specific situation and build something around it. A program designed around the movements you enjoy, structured to fit your schedule, and built toward the physique you're actually working toward.
No more tabs. No more debate. Just a clear plan built for you, and someone in your corner to make sure you execute it.
Head to repxrep.fit to learn more about coaching options and apply for a spot.
