Training for the ectomorph
A lean build, a fast metabolism and the feeling that no amount of food 'sticks' - that is how ectomorphs are usually described. The editorial team looked into how scientifically grounded this classification is, why some people really find it harder to gain mass and how to structure training and nutrition so that progress becomes steady.
Who the ectomorph is and how scientific this classification is
The division of people into ectomorphs, mesomorphs and endomorphs was proposed by the American psychologist William Sheldon in 1940. He called lean people with long limbs, narrow shoulders and a small amount of muscle and fat ectomorphs. Later Carter and Heath (1990) developed a quantitative method of somatotyping that is used in anthropometry and sports science.
It is worth saying right away: in the modern understanding a somatotype is a description of body build, not a diagnosis or a 'verdict.' Sheldon's original ideas about a link between body build and character have been rejected by science. In fitness culture the concept of 'ectomorph' is often used in a simplified way - as a label for a person who finds it 'hard to gain mass.'
However, behind this simplification lie real biological differences. People differ in bone length, shoulder width, the number of muscle fibers, appetite and how much energy they spend on spontaneous activity. These differences really do affect how quickly a person gains mass.
That is why the editorial team uses the term 'ectomorph' as a convenient description of a body type, keeping in mind that real people rarely belong to a 'pure' type, and most have mixed features.
Why lean people find it hard to gain mass
The most frequent cause of difficulties in gaining mass is a banal lack of energy. Many people who believe they 'eat a lot' actually consume less than it seems, especially if their appetite is small and there are skipped meals in the daily diet.
The second cause is high spontaneous activity. The study by Levine et al. (1999) showed that with artificial overeating people differed significantly in their gain of fat mass, and a significant part of these differences was explained by non-exercise activity thermogenesis (NEAT): some people reflexively move, stand and gesture more and thus 'burn off' the surplus of calories.
The third is genetics. In the classic study by Bouchard et al. (1990) on identical twins, prolonged overeating led to very different weight gain between pairs but similar gain within pairs. This indicates that the response to an energy surplus is largely hereditary.
Finally, the response to strength training is also individual. Hubal et al. (2005) described a wide spread in the gain of muscle mass and strength among participants who followed the same program. Some people are 'high responders,' others 'low responders.' However, almost everyone progressed, though at different rates.
Principles of training for the ectomorph
The good news: the training principles for the ectomorph are the same as for everyone. Progressive overload, sufficient volume and sets performed close to failure are needed. The particulars concern accents rather than 'special' methods.
The basis of the program should be multi-joint exercises: squats, presses, rows, pull-ups. They load many muscles at once, make it possible to work with larger weights and make the most efficient use of limited time.
Volume should be built up gradually. A mistake of many lean athletes is to copy the programs of professionals with an enormous number of sets. For a person with a small appetite and high energy expenditure, excessive volume only increases the energy deficit. It is wiser to start with a moderate volume and add to it once nutrition is established.
Workouts should not be too long - 45-75 minutes is quite enough. A frequency of 3-4 sessions a week with each group loaded twice gives a good balance of stimulus and recovery.
| Parameter | Guideline for the ectomorph |
|---|---|
| Workouts per week | 3-4 |
| Basis of the program | Multi-joint exercises |
| Repetition range | Mostly 6-12, part 12-15 |
| Volume | Moderate start, gradual increase |
| Cardio | Moderate, for heart health, without excessive expenditure |
Nutrition: the main limiting factor
For the ectomorph, nutrition is often more important than the program. Without an energy surplus muscles will not grow, no matter how many sets are performed. A practical approach is to gradually increase calorie intake until weight begins to grow steadily, aiming for a slow and controlled gain.
Protein should be sufficient: the meta-analysis by Morton et al. (2018) showed that the additional benefit for the gain of muscle mass plateaued at approximately 1.6 g of protein per kilogram of body mass per day, with a confidence interval up to approximately 2.2 g/kg. For most athletes this range is a reliable guideline.
People with a small appetite are helped by simple techniques recommended, in particular, in the review by Iraki et al. (2019) on the nutrition of bodybuilders during a mass-gaining period:
- regular meals 4-5 times a day;
- calorie-dense but nutritious foods: nuts, nut butters, oils, dried fruits;
- liquid calories - shakes with milk, oatmeal, banana;
- carbohydrates around the workout to support performance;
- weight monitoring 1-2 times a week under the same conditions.
Sports supplements - protein, gainers, creatine - can make it easier to reach goals but are not mandatory. Creatine monohydrate has a good evidence base for increasing performance and mass; a gainer is only a convenient way to add calories.
It is important that the gain be gradual: a sharp surplus produces mainly fat, and in lean people who gain quickly stretch marks on the skin can also appear.
Recovery, sleep and realistic expectations
Sleep is another underestimated resource. Lack of sleep worsens recovery, appetite and hormonal balance. For an athlete seeking to gain mass, 7-9 hours of sleep per day is not a luxury but part of the program.
Excessive cardio and high everyday activity can 'eat up' the calorie surplus. This does not mean cardio should be abandoned - it is good for the heart, but its volume should be taken into account when calculating nutrition.
Expectations should be realistic. Even under the most favorable conditions, the gain of muscle mass in trained people is measured in kilograms per year rather than per month. For the ectomorph progress may be slower, but steady work over several years produces a significant transformation.
If mass does not grow despite a clear surplus, or a person loses weight for no reason, one should see a doctor: an 'ectomorphic' build sometimes hides thyroid dysfunction, digestive disorders or other conditions.
We also recommend reading our articles on training for the endomorph, on progressive overload and on the number of sets per muscle group.
Editorial conclusions
'Ectomorph' is a description of body build, not a verdict. Difficulties with gaining mass are explained by real factors: a small appetite, high spontaneous activity, genetics and different sensitivity to training.
The training principles for the ectomorph are the same as for everyone: progressive overload, multi-joint exercises, sufficient volume. The main limitation is usually in nutrition - without a steady energy surplus and sufficient protein there will be no progress.
Gradual gain, good sleep and patience make it possible for lean people to significantly change their build over several years of regular training.
References
- Sheldon WH. The Varieties of Human Physique. New York: Harper & Brothers; 1940.
- Carter JEL, Heath BH. Somatotyping: Development and Applications. Cambridge University Press; 1990.
- Levine JA, Eberhardt NL, Jensen MD. Role of nonexercise activity thermogenesis in resistance to fat gain in humans. Science. 1999;283(5399):212–214.
- Bouchard C, Tremblay A, Després JP, et al. The response to long-term overfeeding in identical twins. N Engl J Med. 1990;322(21):1477–1482.
- Hubal MJ, Gordish-Dressman H, Thompson PD, et al. Variability in muscle size and strength gain after unilateral resistance training. Med Sci Sports Exerc. 2005;37(6):964–972.
- Morton RW, Murphy KT, McKellar SR, et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. Br J Sports Med. 2018;52(6):376–384.
- Iraki J, Fitschen P, Espinar S, Helms E. Nutrition recommendations for bodybuilders in the off-season: a narrative review. Sports (Basel). 2019;7(7):154.
Andriy Melnyk
A strength-sports coach and author of programs for beginner and intermediate levels. Writes about training planning.
