Choosing a workout split is a decision that depends on the number of days available per week, the recovery capacity of the individual, and the specific training goal, whether that goal is strength, hypertrophy, or general fitness, and research in exercise physiology consistently shows that adherence to a program is the strongest predictor of long term results, which means the “best” split is the one that fits realistically into a person’s weekly schedule rather than the one that looks most advanced on paper.
Training Frequency and Muscle Growth
Studies on training frequency, including a widely cited meta-analysis by Schoenfeld and colleagues, indicate that training a muscle group twice per week produces superior hypertrophy compared to training it once per week, and this finding forms the scientific foundation for most modern split recommendations, since a split that only hits each muscle group one time weekly tends to be less efficient for growth, even though it can still be effective for general health or for beginners who are new to resistance training.
Full Body Split
A full body split involves training all major muscle groups in a single session, repeated three times per week, with at least one rest day between sessions, and this structure is particularly useful for people with limited weekly availability, because it maximizes the frequency of stimulus per muscle group despite the low number of total training days.
| Schedule | Frequency per Muscle | Best For |
|---|---|---|
| Monday, Wednesday, Friday | 3x per week | Beginners, busy schedules, general fitness |
This structure allows for consistent neural adaptation, efficient time use, and manageable recovery demands, and it is often recommended as the starting point for anyone training three days per week or fewer.
Upper Lower Split
An upper lower split divides training into two session types, one focused on the upper body and one focused on the lower body, and this format is typically run four days per week, allowing each muscle group to be trained twice, which aligns directly with the frequency research mentioned earlier.
| Day | Focus |
|---|---|
| Monday | Upper Body |
| Tuesday | Lower Body |
| Wednesday | Rest |
| Thursday | Upper Body |
| Friday | Lower Body |
| Saturday, Sunday | Rest |
This split offers a balance between volume, recovery, and frequency, and it is considered by many sports scientists to be one of the most efficient structures for intermediate lifters who have four dedicated training days available.
Push Pull Legs Split
The push pull legs split organizes training around movement patterns rather than body regions, with push days targeting chest, shoulders, and triceps, pull days targeting back and biceps, and leg days targeting the entire lower body, and this split can be run three times through in a six day week, or adjusted to fit five or four days depending on availability.
| Day | Focus |
|---|---|
| 1 | Push |
| 2 | Pull |
| 3 | Legs |
| 4 | Rest or Repeat |
| 5 | Push |
| 6 | Pull |
| 7 | Legs |
This format allows for higher training volume per muscle group within each session, which appeals to people whose primary goal is hypertrophy, and it requires a higher weekly time commitment compared to full body or upper lower structures, so it tends to suit people training five to six days per week.
Body Part Split
A body part split, sometimes called a “bro split,” assigns one or two muscle groups to each training day, such as chest on Monday, back on Tuesday, legs on Wednesday, shoulders on Thursday, and arms on Friday, and this structure allows for very high volume concentrated into a single session per muscle group.
| Day | Focus |
|---|---|
| Monday | Chest |
| Tuesday | Back |
| Wednesday | Legs |
| Thursday | Shoulders |
| Friday | Arms |
Because each muscle group is only trained once per week under this format, the frequency research suggests it is generally less optimal for hypertrophy compared to upper lower or push pull legs splits, though it remains popular among advanced bodybuilders who can tolerate very high single session volume and who prioritize the mental focus of dedicating an entire session to one region.
Matching Split to Weekly Availability
The number of days realistically available for training each week is the single most practical factor in selecting a split, and the following table summarizes evidence-based recommendations according to weekly day availability.
| Days per Week | Recommended Split |
|---|---|
| 2 to 3 | Full Body |
| 4 | Upper Lower |
| 5 | Upper Lower with an added Push Pull Legs day, or a five day Push Pull Legs rotation |
| 6 | Push Pull Legs, repeated twice |
| 6 to 7 (advanced only) | Body Part Split |
For individuals training two to three days per week, a full body split ensures each muscle group still receives adequate frequency despite the low day count, while for individuals training four days per week, the upper lower split provides a proven balance of frequency and recoverable volume, and for those with five to six days available, push pull legs allows for the higher training volumes associated with advanced hypertrophy goals.
Recovery Capacity and Session Volume
Weekly schedule availability is not the only variable, since recovery capacity, which is influenced by sleep quality, nutrition, age, training experience, and life stress, also determines how much volume a person can absorb without accumulating fatigue, and a split that looks correct on paper can still lead to overtraining if session volume exceeds what the individual can recover from between sessions.
For this reason, exercise scientists generally recommend starting any new split at a moderate volume, tracking recovery markers such as sleep quality, joint soreness, and performance consistency across weeks, and adjusting volume upward only when recovery remains stable, since a split chosen correctly for schedule but executed with excessive volume can still produce poor outcomes.
Goal Specific Adjustments
The primary training goal also shapes which split performs best within a given schedule, since strength focused training benefits from lower total volume with higher intensity and longer rest periods, which fits well within an upper lower or full body structure, while hypertrophy focused training benefits from higher total volume across more exercises per muscle group, which fits well within a push pull legs or body part structure.
| Goal | Best Matching Split |
|---|---|
| Strength | Full Body or Upper Lower |
| Hypertrophy | Push Pull Legs or Upper Lower |
| General Fitness | Full Body |
| Advanced Bodybuilding | Body Part Split or high volume Push Pull Legs |
Practical Application
For a person with two to three available days, full body training three times weekly provides the most efficient use of limited time, for a person with four available days, upper lower training offers a proven combination of frequency and manageable volume, for a person with five to six available days, push pull legs allows higher weekly volume distributed across more focused sessions, and for advanced trainees with very high weekly availability and years of consistent training experience, a body part split can be layered in for additional volume concentration on lagging muscle groups.
Selecting a split according to actual weekly availability, rather than according to what is trending in fitness media, remains the most reliable strategy supported by current exercise science research, and consistency within a realistic schedule continues to outperform any theoretically optimal program that cannot be sustained over time.
Albert Mckennie is a strength and conditioning coach, author, and speaker with experience training athletes and general fitness clients.