How to build a gym routine, step by step

Learning how to build a gym routine comes down to four decisions, made in this order: how many days you can really train, how you split your muscles across those days, how many hard sets you do per muscle each week, and which exercises cover those sets. Everything else is a detail you adjust along the way. A simple routine you repeat for months beats a perfect one you drop after three weeks.

Start with the days you can actually keep

The most common mistake is designing the ideal week instead of the real one. If your job, your schedule or your energy give you three reliable days, plan three. If you skip one of your four planned days every single week, you really have three, and the four day plan only makes you feel like you are failing.

As a general reference, the physical activity guidelines from the World Health Organization and the American College of Sports Medicine recommend training the major muscle groups at least two days a week. That gives you a clear starting point: whether you train two, three or five days, each major muscle should get a stimulus about twice a week. If you want to dig into this decision, there is a full guide on how many days a week to train.

Session length counts too. A 45 minute session you do every time is worth more than a 90 minute one you do now and then. Decide how much time you have and build the session to fit with room to spare, counting your warmup and rest periods.

Pick a split that fits your days

A split is the way you spread muscles across the week. There are only a few options, and they all work when the total volume is similar. This is the usual logic based on the days you have:

1. One day: full body, with one exercise for each big pattern (push, pull, legs).
2. Two days: full body twice, with slightly different exercises each session, or upper body one day and lower body the other.
3. Three days: full body three times, or push, pull and legs.
4. Four days: upper and lower, repeated twice during the week.
5. Five or six days: more sessions per muscle group, with push, pull and legs repeated, only if you truly have the energy and the time.

A 2016 meta analysis by Schoenfeld and colleagues on training frequency concluded that, in general, training each muscle at least twice a week is associated with better muscle growth than training it once. Part of that edge comes from being able to spread the volume over more sessions and arriving less tired at each set. It does not mean more frequency is always better: beyond what you can recover from, it stops adding anything.

For beginners, full body two or three times a week is a very comfortable option. You practice each movement often, you learn technique faster, and nothing bad happens if you miss a session.

How many sets per muscle, and how hard

Weekly volume rules here, meaning the hard sets you do per muscle group. In 2017, Schoenfeld, Ogborn, and Krieger went through the studies comparing different volumes and saw a dose response relationship: more weekly sets per muscle meant more muscle growth, at least up to a point. In practice, many sensible programs sit between 10 and 15 weekly sets per muscle group. A beginner usually does well at the low end of that range, around 10 to 12 sets, so start there and move up only if you recover well.

A set counts when it ends close to failure, which means you have only a few reps left in reserve. If you want a practical way to measure it, the explanation of what RIR is covers it in detail. As a guide, most working sets land between 6 and 15 reps, with rest periods of one to three minutes. Heavy compound lifts need more rest than isolation exercises.

To spread the sets without overdoing it, do this simple math:

1. Choose the number of weekly sets per muscle, for example 12.
2. Divide it by the number of times you train that muscle, for example 2 sessions of 6 sets.
3. Spread those 6 sets over one or two exercises, no more.

Which exercises to choose, and in what order

Two rules help. First, prioritize compound exercises, such as the squat, bench press, row, pullups or Romanian deadlift, because they train several muscles at once and let you progress with heavy loads. Second, fill in with isolation work (curls, triceps extensions, lateral raises, calf raises) only for the muscles you want to develop more.

Order matters as well. Put the most demanding exercise and the one you care about most first, while your head is still fresh. If your chest is a priority, do not leave it for the end of the session. Pick exercises you can perform with comfortable technique using the equipment you have, and remember that swapping them constantly makes it impossible to tell whether you are improving. A common pattern is to keep the main lifts for 6 to 12 weeks and change them only for a reason, such as a niggle or boredom.

Your equipment shapes a lot of this. A home routine with dumbbells and bands can be just as good if you keep the intention of getting close to failure with reasonable loads.

How to know if the routine works

A routine is only a hypothesis. To find out whether it works you need to write down what you do: weight, reps and how close to failure you finished each set. The key is called progressive overload: over time, slightly increasing the weight, the reps or the sets, always with good technique. You can find the full method in the guide to progressive overload.

Look at the trend across several weeks, not a single session. One bad day tells you nothing. Three weeks with almost no improvement, despite good sleep and enough food, is a reason to check your volume, your rest times or your exercises.

One important limit: every person responds differently, and these numbers are starting points, not promises. If you have an injury, a medical condition, a pregnancy or a history of an eating disorder, talk to a health professional before you start or change your training.

How this works in Elvyfit

Elvyfit generates your routine with code rules, based on your questionnaire: days, level, equipment, time per session and any aches. With one day it builds a full body session, with two it uses upper and lower or full body A and B, with three it uses push, pull and legs, and with four it does upper and lower twice. Weekly volume per muscle group starts at 10 to 12 sets for beginners and rises to 12 or 13 for intermediates and 14 or 15 for advanced lifters. It is not an AI improvising: the routine is deterministic, and you can edit it afterward in the editor, changing exercises, sets and order. The app is in Spanish only for now.

To see how it is built from your data, take a look at how personalized gym routines work and how each session is logged in the workout tracker. And if the plan does not fit you, adjust it: the best routine is the one you actually follow.