Muscle-Building Workout Plan: 4-Day Hypertrophy Program

A good muscle-building workout plan trains every major muscle group twice a week, gives each one about 10–20 hard sets a week, keeps most sets in the 6–15 repetition range stopped one to three repetitions short of failure, and adds weight or repetitions a little at a time. The simplest way to get all of that is four sessions a week: two upper-body days and two lower-body days, about 60 minutes each. Pair the plan with enough protein and a small calorie surplus, and most beginners and intermediates gain visible muscle within a few months.

Below is a complete 4-day hypertrophy program you can follow for the next 8 weeks, how to progress it week by week, and what to change if you can only train three days.

What actually builds muscle

Muscle grows when you repeatedly give it a reason to adapt and then let it recover. Four factors decide most of the result:

Weekly volume. More hard sets per muscle bring more growth on average, up to a point. A meta-analysis found a clear dose-response: each extra weekly set added a little more muscle, and 10 or more sets a week produced the largest gains (Schoenfeld, Ogborn and Krieger, 2017). The 2026 ACSM guidelines also recommend about 10 sets per muscle group per week for hypertrophy (ACSM, 2026). Our guide to training volume per muscle explains how to count sets.
Frequency. Training a muscle twice a week builds more muscle than once a week when the total work is similar (Schoenfeld, Ogborn and Krieger, 2016). That is why the plan below hits every muscle on two different days instead of using a "bro split" with one day per body part.
Effort. Sets count when they are hard. Stop most sets with one to three repetitions left in the tank; going to complete failure on every set is not necessary and makes recovery harder. If you are unsure how to judge this, read about RPE and RIR.
Progression. The weights or repetitions must rise over weeks, otherwise the body has no reason to keep adapting. That is progressive overload.

The repetition range matters less than people think: sets of 6, 10 or 15 all build muscle when they are close to failure. Our article on sets and reps for muscle growth covers this in detail.

The 4-day muscle-building workout plan

Train four days a week, for example Monday, Tuesday, Thursday and Friday, and rest on the other days. This is an upper/lower split tuned for hypertrophy: two compound lifts per day for heavy, progressive work, then exercises in higher repetition ranges for extra volume. Rest about 2–3 minutes between sets of the first two exercises and 60–90 seconds on the rest; see rest between sets for why.

Day 1, Upper A4 × 6–84 × 6–83 × 8–103 × 10–123 × 10–123 × 10–12
Day 2, Lower A4 × 6–83 × 8–103 × 10–123 × 10–124 × 10–153 × 10–15
Day 3, Upper B4 × 8–10or4 × 6–103 × 10–124 × 12–153 × 8–103 × 10–12
Day 4, Lower B3 × 8–104 × 8–103 × 12–153 × 12–153 × 12–153 × 10–15

Counting both days, chest, back, shoulders, quads, hamstrings and glutes each get about 10–16 hard sets a week, and arms and calves get 6–8 direct sets on top of the work they do in presses and rows. That sits inside the range the research supports for growth without making sessions longer than about an hour. If you are completely new to lifting, start with the 3-day full-body workout or our beginner gym plan for a month first, then move to this program.

How to progress week by week

Use double progression. Each exercise has a repetition range, such as 8–10. Keep the same weight until you reach the top of the range on every set with clean form, then add the smallest step available, usually 2.5 kg on barbell lifts and 1–2 kg per dumbbell, and build back up. A simple 8-week block looks like this:

An 8-week progression for the muscle-building plan
Weeks	What to do	Effort
1	Find your working weights. Use the listed sets and stop each set with about 3 repetitions in reserve.	Moderate (RIR 3)
2–4	Add a repetition or a little weight every session where possible (double progression).	Hard (RIR 1–2)
5–7	Add one set to two exercises per muscle that is lagging, if recovery is good. Keep progressing loads.	Hard (RIR 1–2)
8	Deload: same exercises, half the sets, lighter weights. Then start the next block a little heavier than week 1.	Easy (RIR 4+)

The deload in week 8 is not wasted time: it lets joints and tiredness recover so the next block starts fresh. Our deload week guide explains other ways to do it. To know whether you are actually progressing, write down the weight and repetitions of every set. A workout log turns "I think I got stronger" into numbers you can beat next session.

Food and recovery: the part outside the gym

Training is the signal; food and sleep are the building material. Three things matter most:

Protein. A large meta-analysis found that gains in muscle mass from resistance training levelled off at about 1.6 g of protein per kg of body weight per day, with an upper confidence limit around 2.2 g/kg (Morton et al., 2018). For a 75 kg person that is about 120–165 g a day, spread over 3–5 meals. More detail is in our guide to protein for muscle growth.
A small calorie surplus. Eating slightly more than you burn, roughly 200–300 kcal a day, supports growth without much fat gain. A good sign is body weight rising by about 0.25–0.5% a week. If weight goes up much faster, most of the extra is fat. If you also want to lose fat, keep calories near maintenance; beginners can still build muscle there, only more slowly.
Sleep. Aim for 7–9 hours. Short sleep makes hard sessions feel harder and slows recovery between them.

For more ways to support growth outside the program, see how to increase lean muscle mass.

If you can only train three days a week

Rotate the four sessions over three training days: Upper A, Lower A and Upper B in week one, then Lower B, Upper A and Lower A in week two, and so on. Each muscle is then trained three times every two weeks instead of twice a week, so progress is a little slower, but the plan stays the same and you never skip a session. Another option is a push/pull/legs routine if you prefer shorter, more focused days.

Common mistakes

Changing the program every week. Muscle is built by beating the same exercises over time. Keep the exercises for at least one full 8-week block.
Too many easy sets. Ten sets stopped far from failure do less than six hard ones. Effort matters as much as the number of sets.
Chasing weight with bad form. If the range of motion gets shorter or the body swings, the muscle does less of the work. Add weight only when the repetitions look the same as before.
Not eating enough. If your body weight has not moved for a month and your lifts have stalled, add a little food before adding more sets.

Common questions

How long does it take to see muscle growth?

Most people notice their lifts rising within 2–4 weeks, mostly from better coordination. Visible changes in muscle size usually take 8–12 weeks of consistent training and eating.

Is this plan good for beginners?

Yes, if you already know the basic lifts. Start with fewer sets (for example 3 instead of 4) and lighter weights in the first two weeks. If you have never lifted, begin with a simpler full-body plan for a month.

Can I do this plan at home?

Partly. With adjustable dumbbells, a bench and a pull-up bar you can swap barbell lifts for dumbbell versions and machines for split squats, hip thrusts and band exercises. The principles of volume and progression stay the same.

Is it safe?

These are standard gym exercises, but start light, learn the technique, warm up before heavy sets and stop any movement that causes sharp pain. If you have an injury or a health condition, or are pregnant, get advice that fits your situation first.

Muscle-Building Workout Plan: A 4-Day Hypertrophy Program