How to start working out at the gym
A beginner routine has few days, few exercises and few sets. Each session revolves around the main lifts for each pattern, like a squat, a press, a row or a pulldown and a hip exercise. For example, the dumbbell goblet squat, the dumbbell bench press, the lat pulldown, the seated cable row and the dumbbell Romanian deadlift. They are few movements, and you repeat them several times a week until they feel right.
The ACSM (2009) proposes that beginners train the whole body 2 to 3 days per week, with 1 to 3 sets per exercise and loads that allow 8 to 12 reps. It also recommends starting with moderate loads, because at first the most important thing is learning technique. In the first weeks strength goes up mostly because your body learns the movement, not because the muscle has already grown. That is why it is better to start light and go up gradually.
There is no single correct routine to start with. The ACSM (2026) points out that many different programs work for people who don't train, as long as they progress and stick with it over time, and it considers it more important to adapt the routine so you actually train than to meet exact criteria. The best routine to start with is the one that fits your week and that you can repeat for months.
Which routine to choose based on your days and where you train
- With 2 days. Beginner Full Body 2 Days trains the whole body in every session, so each muscle works twice a week.
- With 3 days. Beginner Full Body 3 Days is the most complete starting point, with three different sessions. Strength 5x5 3 Days works if you are mostly interested in adding weight to the back squat, the press and the deadlift. PPL 3 Days trains each muscle only once a week, so when you are starting out full body spreads the work better.
- With 4 days. Beginner Upper-Legs 4 Days alternates upper and lower days. You don't need to go through a full body routine first. In a trial with women with no experience, 4 sessions of upper-lower and 2 of full body with the same weekly sets gave similar gains in strength and muscle (Pedersen et al., 2022).
- If you are coming back after a long break. The ACSM (2009) treats someone who has been away from training for several years as a beginner. Back to the Gym 3 Days starts with 2 sets per exercise, uses machines and bodyweight and, from the third week, adds a set on the main exercises if you are recovering well.
- If you train at home. Bodyweight Home 3 Days uses your body weight, a pull-up bar, a band and a bench. Home with Dumbbells 4 Days adds a pair of adjustable dumbbells. The type of equipment did not change results consistently in the ACSM (2026) analysis, and muscle grows with light or heavy loads if the sets are hard (Schoenfeld et al., 2017).
- If you are short on time. Express Full Body 3 Days uses supersets to train the whole body in 35 minutes, and Full Body Density 3 Days does it in 30. Metabolic Circuit 3 Days adds a short block of burpees at the end, with a low-impact alternative.
- If you want to prioritize one area. Glute specialization · Beginner, Calf specialization · Beginner and Core specialization · Beginner raise the sets for one area without advanced techniques. They have 4 days, so they fit better once you are comfortable with the main lifts.
If your goal is to lose fat, weights are still the base. In people with overweight, combining strength training with eating less lowered body fat percentage the most, and lean mass was maintained (Lopez et al., 2022). The calorie calculator gives you a starting point.
How to spread the days across the week
With full body, leave a rest day between sessions, because each day works the same muscles. With upper-lower you can train two days in a row, since each day works a different half of the body.
| Day | 2 days | 3 days | 4 days |
|---|---|---|---|
| Monday | Day A | Day A | Upper A |
| Tuesday | Rest | Rest | Lower A |
| Wednesday | Rest | Day B | Rest |
| Thursday | Day B | Rest | Upper B |
| Friday | Rest | Day C | Lower B |
| Saturday | Rest | Rest | Rest |
| Sunday | Rest | Rest | Rest |
Pick the number of days you can stick to almost every week, not the one you would like. A 2 or 3-day routine that you complete does more than a 4-day one where you often miss. If you end up with extra time later, you can always add a day.
How many sets, how much effort and how much rest
When you are starting you don't need much volume. The ACSM (2026) concludes that one set is better than none and two are better than one, and proposes doing at least two sets per exercise. It also highlights that minimal doses of training already give gains in strength and muscle. In a comparison of many ways of training, all of them grew muscle in a similar way, and the multiple-set ones ranked better (Currier et al., 2023).
That is why Mobbe's beginner routines use 2 or 3 sets per exercise. To build muscle, the ACSM (2026) associates the greatest hypertrophy with 10 or more sets per muscle per week, and more sets give more growth (Schoenfeld, Ogborn and Krieger, 2017). That is a number to work up to over time, not the starting point.
| Muscle | Beginner Full Body 2 Days | Beginner Full Body 3 Days | Beginner Upper-Legs 4 Days | Back to the Gym 3 Days |
|---|---|---|---|---|
| Chest | 6 over 2 days | 9 over 3 days | 6 over 2 days | 4 over 2 days |
| Back | 6 over 2 days | 9 over 3 days | 6 over 2 days | 6 over 3 days |
| Shoulders | 2 over 1 day | 4 over 2 days | 5 over 2 days | 2 over 1 day |
| Quads | 6 over 2 days | 9 over 3 days | 9 over 2 days | 4 over 2 days |
| Hamstrings | 6 over 2 days | 6 over 2 days | 6 over 2 days | 2 over 1 day |
The table counts the sets where each muscle is the primary one and the days on which it is worked. The main lifts also add to other muscles, like the press to the triceps or the squat to the glutes.
You don't need to reach failure. Neither the ACSM (2026) nor the meta-analyses by Grgic et al. (2022) and Refalo et al. (2023) find a clear advantage of failure for building muscle, and the ACSM proposes finishing with 2 or 3 reps in reserve (RIR). Every routine lists the RIR for its exercises. At first it is hard to estimate how many reps you have left, and you learn it with practice. When in doubt, stay a bit further from failure and take care of your technique.
Between sets, rest enough to do the next one well. In people with no experience, rests of 60 to 120 seconds were enough to gain strength (Grgic et al., 2018), and for muscle, resting more than 60 seconds gave a small benefit, with no clear differences beyond 90 (Singer et al., 2024). Mobbe's beginner routines call for about 2 minutes on the main lifts and 1 minute on single-muscle exercises.
How to progress over the first months
Progressing means doing a bit more than last time, with one more rep or a little more weight. The ACSM (2009) asks for progression to be introduced gradually. Mobbe's beginner routines with weights use double progression.
- Pick a comfortable weight that lets you reach the bottom of the range with the reps in reserve the routine calls for. If it says 3 × 8–12 at RIR 3, look for a weight you can lift for 8 with 3 left.
- Add reps with that weight in every session, with the same technique and the same range of motion.
- Go up in weight when all sets reach the top of the range. Use the smallest increase available and return to the bottom of the range.
The ACSM (2009) gives a similar rule, which is to raise the load by 2 to 10% when you do 1 or 2 more reps than targeted in two sessions in a row. Adding reps or adding weight both work (Plotkin et al., 2022), so you don't need to go up in weight every week. In Strength 5x5 3 Days the rule is different: you add 2.5 kg when you complete all the sets and drop 10% if you fail two sessions in a row. In Bodyweight Home 3 Days, when you complete the top of the range on all sets you move to a harder variation of the exercise.
In the first months you will go up fast and then the pace slows down. That is normal. The ACSM (2009) acknowledges that you can't keep improving at the same rate for years. If progress stalls for several sessions in a row, check your sleep and food before changing anything. The protein calculator gives you the grams for your weight.
Move to an intermediate routine when you have mastered the main lifts and, even sleeping and eating well, you no longer progress session to session with the beginner routine. The change doesn't require more days. According to the ACSM (2009), going from beginner to intermediate doesn't require training each muscle more times, and it proposes multiple-set programs that vary volume and intensity. For example, from Beginner Full Body 3 Days you can move to Intermediate Full Body 3 Days, and from Beginner Upper-Legs 4 Days to Intermediate Upper-Legs 4 Days.
In Mobbe every set is saved. When you train, you see what you did in the previous session on each exercise, so you know what to beat.
Common mistakes when starting out
- Starting with too much. Five or six days and lots of sets from the first week add fatigue and are hard to sustain. The ACSM (2009) advises against raising volume all at once. Start with what the routine calls for and add little by little.
- Loading up before learning the movement. If the weight forces you to shorten the range of motion or change your posture, it is too much. The ACSM (2009) proposes moderate loads at first while you learn the technique, and the ACSM (2026) includes full range of motion among the things that help build strength.
- Taking every set to failure. Finishing every set unable to do one more rep isn't needed to build strength or muscle (Grgic et al., 2022), and with technique still unsure the last reps come out worse.
- Changing routines or exercises every few weeks. Repeating the same exercises lets you learn them and compare session to session. Rotating exercises at random or too often can take away from your progress (Kassiano et al., 2022).
- Training without logging. Without a log you don't know what weight you used or how many reps you did last time, and progression depends on that data.
Questions about beginner routines
Machines or free weights?
Both work. The ACSM (2009) notes that machines are considered safer and easier to learn, and the ACSM (2026) did not find that the type of equipment changes results consistently. That is why Mobbe's beginner routines mix machines, cables, dumbbells and barbell.
Can I start with a push pull legs or an upper-lower?
Yes. With the same weekly volume, splitting the body or training it all at once gives similar results (Ramos-Campo et al., 2024). With 3 days, a full body routine trains each muscle more times than a push pull legs. With 4 days, an upper-lower is a good option from the start.
How long do I stay on the same routine?
As long as you keep adding reps or weight. Mobbe's beginner routines are designed for 6 to 12 weeks, and you can repeat them if you keep progressing.
What do I do if I miss a day?
Do the session that was due on your next available day and move the rest. With full body, leave a rest day before the next session instead of training two days in a row.
Can I do cardio in addition to weights?
Yes. In a meta-analysis of 43 studies, adding aerobic exercise did not hold back muscle or maximal strength (Schumann et al., 2022). If you do both on the same day, lifting weights first was associated with more leg strength (Murlasits et al., 2018).
Sources
- American College of Sports Medicine. American College of Sports Medicine position stand. Progression models in resistance training for healthy adults. Med Sci Sports Exerc. 2009. doi:10.1249/MSS.0b013e3181915670
- Currier BS, D'Souza AC, Singh MAF, et al. American College of Sports Medicine Position Stand. Resistance training prescription for muscle function, hypertrophy, and physical performance in healthy adults: an overview of reviews. Med Sci Sports Exerc. 2026. doi:10.1249/MSS.0000000000003897
- Currier BS, Mcleod JC, Banfield L, et al. Resistance training prescription for muscle strength and hypertrophy in healthy adults: a systematic review and Bayesian network meta-analysis. Br J Sports Med. 2023. doi:10.1136/bjsports-2023-106807
- Grgic J, Schoenfeld BJ, Skrepnik M, Davies TB, Mikulic P. Effects of rest interval duration in resistance training on measures of muscular strength: a systematic review. Sports Med. 2018. doi:10.1007/s40279-017-0788-x
- Grgic J, Schoenfeld BJ, Orazem J, Sabol F. Effects of resistance training performed to repetition failure or non-failure on muscular strength and hypertrophy: a systematic review and meta-analysis. J Sport Health Sci. 2022. doi:10.1016/j.jshs.2021.01.007
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- Lopez P, Taaffe DR, Galvão DA, et al. Resistance training effectiveness on body composition and body weight outcomes in individuals with overweight and obesity across the lifespan: a systematic review and meta-analysis. Obes Rev. 2022. doi:10.1111/obr.13428
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- Ramos-Campo DJ, Benito-Peinado PJ, Andreu-Caravaca L, Rojo-Tirado MA, Rubio-Arias JÁ. Efficacy of split versus full-body resistance training on strength and muscle growth: a systematic review with meta-analysis. J Strength Cond Res. 2024. doi:10.1519/JSC.0000000000004774
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