Best Workout Splits for Muscle Gain (And How to Choose the Best One for You)

Once you've been a lifter for more than a few weeks, you'll have likely stumbled into the great workout split debate. Full body or push pull legs? Four days or six? Bro split or bust? The internet has opinions (many of them loud, most of them conflicting), and it can feel like picking the wrong split will tank your gains. It might be boring, but the truth is, the best workout split for muscle gain is the one you can do consistently with enough volume and effort over the week. The actual split type itself matters a whole lot less than what people think.

So instead of arguing about which layout is "optimal" (spoiler: they all work), let's break down what a workout split actually is, how the most popular types compare, and how to build a 4 day workout split that fits your life, your schedule, and your goals.

What Is a Workout Split?

A workout split is how you organize your training over the week. Instead of doing every exercise every session, you divide muscle groups or movement patterns across different days so each group gets dedicated work and recovery time.

How you split things up depends on how many days you train, what you are training for, and how quickly you recover between your workouts.

Why Splits Work (And Who Benefits Most)

Splitting your training gives each muscle group more focused attention per session, which means better quality sets and more room to push intensity. It also builds in recovery time so you are not squatting on trashed legs from yesterday. That's pretty key if you're chasing muscle, because quality reps close to failure are what drive growth.

If you're a lucky beginner, you'll likely see fantastic results on almost any split (or no split at all) because everything is new stimulus. But once you have a year or two of consistent lifting under your belt, sessions get heavier, warm-ups get longer, and stuffing everything into one workout isn't at all practical (and is honestly miserable). A split lets you give each muscle group the volume it needs without running yourself into the ground after 45 minutes.

How to Pick the Best Workout Split for Muscle Gain

Forget hunting for a magical split that will make all of your swole dreams come true. The research boils it down to a few principles that matter way more than which day you train chest.

Hit Each Muscle at Least Twice a Week

Training a muscle once a week (the classic bro split) works, but bumping frequency to at least twice per week gives a pretty decent boost in muscle growth. Beyond that, though, you won't get quite as much out of adding days.

Two, three, or four times a week all produce very similar hypertrophy when total weekly volume is the same. So twice per muscle is an ideal minimum, and anything above that is more of a preference in how you want to break up the total volume.

Get Your Weekly Volume Right

Speaking of volume (total hard sets per muscle per week), it has the clearest relationship with muscle growth. Aim for around 10 to 20 sets per muscle group per week.

How you distribute those sets across the week doesn't change the outcome much. Ten sets in two sessions or spread over four will get you to the same place, but definitely take time and fatigue into account when you plan this out.

Respect Your Recovery

Do not train a muscle that is still decently sore or weak from your last workout. Training to failure and using high volume slows recovery quite a bit, sometimes 48 hours or more. 

If you are chronically sore going into sessions, add a rest day or dial back per-session volume. On the flip side, once a muscle is recovered, there is no benefit in waiting extra days to train it again, so hop to it.

Pick a Schedule You Can Actually Stick To

This sounds too simple to be useful, but it is the single biggest factor. Research shows that different training frequencies lead to similar muscle growth as long as the work is the same, and men and women see similar results when training with the same effort.

Training four or five days a week works well for most people. Just choose a plan you will follow consistently for a long time.

Different Types of Workout Splits

Here are the three most common muscle gain focused splits.

Full Body Workout Split

Train every major muscle group each session, typically two to four days per week. This is arguably the best split for beginners and busy people who can only hit the gym a few days because it guarantees every muscle gets trained at least twice a week.

The downside is that as you get stronger, full body sessions get long and taxing. Heavy squats, rows, and presses in the same workout will leave the last exercises running on fumes. If you are more advanced and need some serious volume per muscle group, a full body layout can become logistically impossible without three hour sessions (nobody wants that).

Here's a full-body cable workout you can try.

Upper Lower Split Workout

Alternate between upper body and lower body days, usually four sessions per week (two upper, two lower). It naturally hits every muscle twice a week, manages fatigue well, and is is able to fit into most goals.

The main limitation shows up for advanced lifters again because fitting chest, back, shoulders, biceps, and triceps into a single upper body session can get crowded, and make it harder to prioritize lagging body parts.

Push Pull Legs Split

Separate your training into pushing movements (chest, shoulders, triceps), pulling movements (back, biceps, rear delts), and legs. Run it over three days to hit everything once a week, or run it over six days for twice a week, which is arguably better.

A push pull legs split naturally prevents interference between movement patterns (your pulling session will not torch the muscles you need for pressing the next day). One smart tweak for this split is to rearrange the order to Push, Legs, Pull to avoid having a heavy pull day fatiguing your lower back right before leg day, because.... deadlifts.

Another option is a mashup of PPL and upper/lower split that becomes a 5 day a week routine: Push, Pull, Legs, Upper, Lower. This hits everything twice and is a great balance of muscle groups each week.

A Simple 4 Day Workout Split

A 4 day workout split is usually the most manageable for most lifters. Here is an upper/lower plan that hits every muscle twice per week with plenty of recovery in between.

• Day 1 (Upper A): Bench press 3x6-8, barbell row 3x8-10, overhead press 3x8-10, cable curl 3x10-12, tricep pushdown 3x10-12, lateral raise 2x12-15
  
  
• Day 2 (Lower A): Back squat 3x6-8, Romanian deadlift 3x8-10, walking lunge 3x10/leg, leg curl 3x10-12, calf raise 3x12-15
  
  
• Day 3: Rest
  
  
• Day 4 (Upper B): Incline dumbbell press 3x8-10, pull-up or lat pulldown 3x8-10, dumbbell shoulder press 3x10-12, hammer curl 3x10-12, overhead tricep extension 3x10-12, face pull 2x15
  
  
• Day 5 (Lower B): Deadlift 3x5-6, leg press 3x10-12, Bulgarian split squat 3x8-10/leg, leg extension 3x10-12, seated calf raise 3x12-15
  
  
• Days 6-7: Rest (or light conditioning, walks, mobility)
  

Progress by adding a small amount of weight, an extra rep, or an additional set over time. Keep 1-2 reps in reserve on most sets and push closer to failure on isolation and machine exercises.

Takeaway

At the end of the day, the "best" split is going to be the one you’ll actually stick to. As long as you’re hitting each muscle group at least twice a week and logging 10 to 20 hard sets for each, you’re on the right track. An upper/lower split is an ideal place to start, but if you only have a few days, full-body sessions are your best friend. Got more time? Try a push/pull/legs or PPLUL routine. The layout isn’t magic, it's your consistency, effort, and total volume that'll really build the muscle.

FAQ

How should I choose between full body and split workouts for my fitness goals?

Look at how many days per week you can realistically train. If you have two or three days, full body is usually the better fit because it guarantees enough frequency. If you have four or more days, a split (upper/lower, push pull legs) lets you dedicate more volume to each muscle group per session without marathon workouts. Both produce similar muscle growth when weekly volume and effort are matched, so go with the option that fits your schedule and keeps you consistent.

Is a full body workout more effective for fat loss than split training?

There is some evidence that full body training may promote slightly more fat loss compared to a split in trained lifters, though hypertrophy was similar in both groups. Full body sessions tend to burn more calories per session because you are working more total muscle mass. For fat loss, training structure matters less than maintaining a calorie deficit, keeping protein high, and lifting consistently to preserve muscle.

What are the different types of workout splits?

The most common types of workout splits are full body (every muscle each session), upper/lower (alternate upper and lower body days), push/pull/legs (group by movement pattern), and the bro split (one muscle group per day). There are also hybrid layouts and custom splits where you assign frequency per muscle based on your priorities and recovery. For most people chasing muscle gain, an upper/lower or push/pull/legs split trained four to six days per week covers all the bases.