In brief:
- A 4-day-a-week bodybuilding program lets you train each muscle group two times within a seven-day period – the optimal frequency for hypertrophy.
- The best split alternates between upper and lower body (Upper/Lower split), which allows enough time for recovery.
- The optimal volume is 10–20 sets per muscle group per week, with reps in the 6–15 range.
- Muscle mass grows during recovery: protein requirement is 1.6–2.2 g per kilogram of body weight per day.
A 4-day-a-week bodybuilding program is one of the most popular and best science-supported approaches to muscle building. The structure of a 4-day bodybuilding program gives your body plenty of growth stimulus while still leaving enough time to recover. If you are already used to a beginner program of two or three days a week and feel ready to increase your volume, this guide is for you.
How does a 4-day-a-week bodybuilding program work?
A 4-day bodybuilding program is built on training principles aimed at muscle growth (hypertrophy). A systematic meta-analysis shows that training a muscle group two times a week produces a statistically significantly greater hypertrophy effect than training it one time a week (Schoenfeld et al., 2016). A four-day program allows exactly that: each muscle group gets two waves of stimulus per week, which is ideal from the standpoint of recovery and growth.
The American College of Sports Medicine (ACSM) guidelines recommend that intermediate lifters train each muscle group 2–3 times a week (ACSM, 2009). A four-day upper/lower split meets this requirement exactly: two upper-body and two lower-body workouts within a seven-day period.
You will find a more detailed overview of the principles of designing a training program in a separate guide, but with a 4-day bodybuilding program the most important thing is the balance between volume, intensity and recovery.
Which split suits a 4-day bodybuilding program?
The most effective split for a four-day program is alternating upper and lower body (Upper/Lower split):
- Day 1 – upper body, pressing emphasis (chest, shoulders, triceps)
- Day 2 – lower body, quadriceps emphasis (squat, press)
- Day 3 – active rest (walking, light stretching)
- Day 4 – upper body, pulling emphasis (back, biceps)
- Day 5 – lower body, hamstring emphasis (deadlift, leg curls)
- Days 6–7 – recovery
Another common option is a Push/Pull/Legs-style 4-day program, in which one week includes more upper-body workouts and the other more lower-body workouts. Still, the upper/lower approach suits most adult lifters better, because it distributes the training load more evenly.
What does a specific weekly plan with exercises look like?
Day 1 – Upper body (pressing emphasis)
| Exercise | Sets | Reps |
|---|---|---|
| Bench press | 4 | 8–10 |
| Incline dumbbell press | 3 | 10–12 |
| Dumbbell lateral raises | 3 | 12–15 |
| Standing overhead press (OHP) | 3 | 10–12 |
| Cable triceps pushdown | 3 | 12–15 |
Day 2 – Lower body (quadriceps emphasis)
| Exercise | Sets | Reps |
|---|---|---|
| Squat | 4 | 8–10 |
| Leg press | 3 | 10–12 |
| Leg extensions | 3 | 12–15 |
| Romanian deadlift | 3 | 10–12 |
| Standing calf raise | 4 | 15–20 |
Day 4 – Upper body (pulling emphasis)
| Exercise | Sets | Reps |
|---|---|---|
| Wide-grip lat pulldown | 4 | 8–10 |
| Bent-over dumbbell row | 3 | 10–12 |
| Seated cable row | 3 | 12–15 |
| Biceps curl machine | 3 | 10–12 |
| Dumbbell hammer curls | 3 | 12–15 |
Day 5 – Lower body (hamstring emphasis)
| Exercise | Sets | Reps |
|---|---|---|
| Romanian deadlift | 4 | 8–10 |
| Bulgarian split squat | 3 | 10–12 |
| Leg curls | 3 | 12–15 |
| Hip thrusts | 3 | 12–15 |
| Seated calf raise | 3 | 15–20 |
You can complement your arm development with elements of a one-day arm program, adding biceps and triceps exercises at the end of your upper-body workouts if arm development is a priority.
How many sets and reps are optimal?
Based on the NSCA and international meta-analyses, the following are optimal for hypertrophy (Schoenfeld, 2010; Ralston et al., 2017):
- Reps per set: 6–15 (it is useful to alternate heavy sets of 6–8 reps with lighter sets of 12–15 reps)
- Sets per muscle group per week: 10–20
- Rest between sets: 2–3 minutes for heavy compound lifts, 60–90 seconds for isolation exercises
- Progressive overload: increase the weight by 2.5–5% as soon as the prescribed reps become comfortable
Progressive overload is the main driver of muscle mass growth (ACSM, 2009). Without it, your volume may be high, but your muscles adapt and growth stalls.
How does nutrition support a 4-day bodybuilding program?
Training creates the growth stimulus, but muscles grow during recovery – and that requires adequate nutrition. The Estonian Health Board recommends regular physical activity for adults, but additional recommendations apply to bodybuilders:
- Protein: 1.6–2.2 g per kilogram of body weight per day (Schoenfeld, 2010)
- Energy: a slight surplus of 200–400 kcal during a muscle-building phase
- Number of meals: 3–5 per day, with protein spread evenly across all meals
- Carbohydrates around training: a pre-workout meal supports performance, a post-workout meal supports recovery
Many bodybuilders use pre-workout supplements (e.g. caffeine, beta-alanine) to support training intensity. These are an optional extra, not an essential part of the program. You can read about the principles Estonia’s top athletes rely on in the article The current state of Estonian bodybuilding’s top level.
References
- Schoenfeld BJ, Ogborn D, Krieger JW. (2016). Effects of Resistance Training Frequency on Measures of Muscle Hypertrophy: A Systematic Review and Meta-Analysis. Sports Medicine. 46(11):1689–1697. PMID: 27102172
- American College of Sports Medicine. (2009). ACSM Position Stand: Progression Models in Resistance Training for Healthy Adults. Medicine & Science in Sports & Exercise. 41(3):687–708. PMID: 19204579
- Schoenfeld BJ. (2010). The Mechanisms of Muscle Hypertrophy and Their Application to Resistance Training. Journal of Strength and Conditioning Research. 24(10):2857–2872. PMID: 20847704
- Ralston GW, Kilgore L, Wyatt FB, Baker JS. (2017). The Effect of Weekly Set Volume on Strength Gain: A Meta-Analysis. Sports Medicine. 47(12):2585–2601. PMID: 28755103
Frequently asked questions
Is a 4-day bodybuilding program suitable for beginners?
A 2–3-day program, in which the whole body is trained in a single workout, suits beginners better. A 4-day program is optimal for intermediate lifters who have trained regularly for at least 6–12 months.
Which days are best for a 4-day program?
The classic choice is Monday, Tuesday, Thursday, Friday – that leaves Wednesday and the weekend for rest. It is important to have at least one rest day between two consecutive training days.
How long should a 4-day bodybuilding workout last?
The optimal workout duration is 60–90 minutes. Workouts lasting more than two hours do not produce additional hypertrophy, but they increase recovery demands and cortisol levels.
How many sets per muscle group per week is optimal?
Based on the scientific literature, 10–20 sets per muscle group per week is optimal for hypertrophy. Start with 10–12 sets and increase progressively, keeping an eye on your recovery.
Can you do cardio alongside a 4-day program?
Yes. Low-intensity cardio (walking, cycling) 2–3 times per week supports recovery and does not negatively affect muscle mass gains. Avoid hard interval cardio right after strength training.
Come and train! ArtGym
