The four-day upper/lower hypertrophy split is one of the most effective and time-efficient workout structures for building muscle. By dividing your weekly training volume across two distinct upper-body sessions and two lower-body sessions, this program provides optimal training frequency, allowing each major muscle group to be trained twice per week without inducing excessive systemic fatigue or joint strain.
Program Structure and Weekly Organization
Organizing your workout week into four training days striking a balance between high-quality stimulus and adequate recovery. A recommended weekly schedule follows an Upper A, Lower A, Rest, Upper B, Lower B, Rest, Rest structure (for example, training on Monday, Tuesday, Thursday, and Friday). This layout ensures that after two consecutive intense training sessions, your central nervous system and muscular system receive a rest day to facilitate repair and protein synthesis.
Each workout within this split targets complementary muscle groups. Upper body sessions combine horizontal pushing, horizontal pulling, vertical pushing, vertical pulling, and isolated arm work. Lower body sessions focus on knee-dominant movements such as squats, hip-dominant movements such as Romanian deadlifts, single-leg stabilization exercises, and direct core work.
Progressive Overload and the Double Progression Method
Hypertrophy requires a consistent, measurable increase in tension over time. This program relies on the double progression method, a simple yet highly effective system for driving steady progress without sacrificing form. Rather than attempting to add weight to the bar every single week, double progression sets a target rep range (for instance, 8 to 12 repetitions) for a given exercise.
To execute double progression:
- Select a load that allows you to complete all working sets at the lower rep threshold (e.g., 8 reps) with 1 to 3 repetitions in reserve (RIR).
- Maintain that same load in subsequent workouts until you can perform the top rep threshold (e.g., 12 reps) across all prescribed working sets with strict technique.
- Once you successfully hit the upper rep target across all sets, increase the resistance by the smallest available increment (typically 2.5 to 5 pounds or 1 to 2 kilograms) for the next workout.
- Reset to the bottom of the rep range with the new weight and repeat the process.
This method guarantees that load increases only occur when muscle adaptation has actually taken place, protecting joint health and preventing premature plateaus.
Managing Fatigue, Substitutions, and Deloading
Systemic fatigue accumulates naturally over consecutive weeks of hard training. To maintain long-term progress, this program incorporates structured fatigue management. If your progress stalls on primary lifts for two consecutive weeks, or if you experience persistent joint discomfort or sleep disruption, a deload week is indicated. During a deload, reduce total working sets by 50 percent while maintaining modest loads to allow connective tissue and the central nervous system to recover fully.
Additionally, exercise selection should remain consistent for at least 8 to 12 weeks to accurately measure progression. However, if specific equipment is occupied or causes joint irritation, use the listed substitutions to maintain equivalent biomechanical patterns.
Day 1: Upper A
| Exercise | Sets | Reps | Rest |
|---|---|---|---|
| Incline Dumbbell Bench Press | 4 | 8-12 | 90-120s |
| Barbell Bent-Over Row | 4 | 8-12 | 90-120s |
| Dumbbell Shoulder Press | 3 | 8-12 | 75-90s |
| Lat Pulldown | 3 | 10-15 | 75-90s |
| Dumbbell Bicep Curl | 2 | 10-15 | 60s |
Day 2: Lower A
| Exercise | Sets | Reps | Rest |
|---|---|---|---|
| Barbell Back Squat | 4 | 6-10 | 120-180s |
| Dumbbell Romanian Deadlift | 3 | 8-12 | 90-120s |
| Bulgarian Split Squat | 3 | 8-12 per leg | 75-90s |
| Plank | 3 | 30-60s | 45-60s |
Day 3: Upper B
| Exercise | Sets | Reps | Rest |
|---|---|---|---|
| Barbell Bench Press | 3 | 6-10 | 120s |
| Pull-Up | 3 | 6-10 | 90-120s |
| Seated Row | 3 | 10-15 | 75-90s |
| Lateral Raise | 3 | 12-20 | 60s |
| Tricep Pushdown | 2 | 10-15 | 60s |
Day 4: Lower B
| Exercise | Sets | Reps | Rest |
|---|---|---|---|
| Romanian Deadlift | 3 | 6-10 | 120s |
| Goblet Squat | 3 | 10-15 | 90s |
| Hip Thrust | 3 | 8-12 | 90-120s |
| Leg Extension | 2 | 12-20 | 60s |
How to Progress This Plan
- Progression step 1: Start near the lower end of each rep range with 1-3 reps in reserve.
- Progression step 2: When all work sets reach the top of the range with controlled form, add the smallest practical load next session.
- Progression step 3: If performance drops for two exposures, keep load stable and reduce accessory work before adding more volume.
Warm-up
- Perform 5-10 minutes of easy activity.
- Use 2-4 lighter ramp-up sets before the first compound lift.
Deload
When: Persistent performance decline, unusually high fatigue, or after 6-8 hard weeks.
For one week, reduce sets by about half and keep loads comfortably submaximal.
Substitutions
- Incline Bench Press: Use when dumbbells are unavailable.
- Lat Pulldown: Use an adjustable load to match current pulling strength.
- Romanian Deadlift: Use when a barbell is preferred and technique is stable.
Time variants
- 45 minutes: Keep the first three exercises each day and reduce accessory work to two sets.
Tracking and export
Track exercise, load, sets, reps, reps in reserve. Export your log
Safety
- Use only ranges of motion you can control without pain.
- Get qualified coaching for unfamiliar barbell lifts.
References
- ACSM Resistance Training Position Stand
- Dose-response relationship between weekly resistance training volume and increases in muscle mass
See our exercise methodology for how this evidence is applied and its limits.
Frequently Asked Questions
- How long should I run this hypertrophy split?
- Run it long enough to collect several weeks of consistent training data. Change exercises only when progression, comfort, or equipment requires it.
- Can beginners use this plan?
- Beginners can use the structure, but should start with fewer sets and prioritize learning the linked movements before adding volume.
Want a plan built around your exact numbers instead? Try the free workout plan generator or browse every workout plan Your PT publishes.