Always tired and a lack of energy?
Many adult prematures have less energy, despite taking sufficient rest. This makes it often difficult for this group to meet all the expectations of the environment and someone has to make choices.
How does it work?
You can see the body as a battery. In the ideal situation our battery starts at 100%. During the day, someone starts doing things such as housekeeping, working or sports. These tasks cost energy and cause the battery to die. Certain tasks cost more energy than other tasks and also cause the battery to die faster. In the ideal situation you will be tired at the end of the day, but still have enough reserves. This reserve is important, because if there is an unexpected situation or a task, it can still be maintained.
In case of a prolonged overload or in case of many adult prematures, this battery often starts at a lower position. In some cases, it can even feel like 50% or lower. In this case too, someone will have to do certain tasks one day. If that is the case, someone will have to claim their reserves more quickly. This person will also be tired at the end of the day, but has no more reserves for the unexpected tasks or situations. If this situation occurs for a long time and someone keeps asking about it, there is not enough rest to build up any kind of reserve. This causes someone to survive and the body is purely concerned with survival and the body is under stress. This position is not helping and will not provide rest and reserves.
But how come?
There is no clear one-sided answer on what causes adult prematures. There are several things that can contribute to a lack of energy. In addition, causes may also lie in life at the moment. For example, illness, stress, poor sleep, hormone abnormalities etc. can also be causes of a lack of energy that are not necessarily related to premature birth. Therefore, stay alert to what is happening at the moment and get help on time from e.g. the GP.
The nervous system:
The nervous system may be part of the cause. In adult prematures, the nervous system is developed differently and reacts more quickly to stress. If someone experiences prolonged stress, the body is in a survival state. This position takes a lot of energy, so the body is purely concerned with survival. Long-term standing in this position causes the battery to run out slowly and not to supplement, because rest is very difficult to experience.
The rest metabolism also called Resting Energy Expenditure (REE):
The Resting Energy Expenditure (REE) has many names and is better known in the Netherlands as the rest metabolism (dust exchange at rest) or the energy consumption at rest.1
In short, how hard the body has to work to stay alive.
The rest metabolism pertains to the amount of energy a person uses to stay alive when someone is in mental and physical rest. In healthy adults, the body consumes about 1kcal/kg of body weight per hour in this state of rest. There is also a difference per part of the body. Thus, the liver, intestines, brain, kidneys and heart constitute about 10% of the total body weight, but require about 75% of the rest metabolism. The muscles require about 20% of the rest metabolism, but represent 40% of the body weight. Finally, fatty tissue requires less than 5% of rest metabolism, but usually represents more than 20% of body weight.2
Several studies have conducted studies on the influence of diet on rest metabolism in adult life in the first few weeks. Here are prematures with a low birth weight compared to those born on time.
It appears that the diet had the most influence on the subsequent effects in the first three weeks. When baby So the body had to work less hard to stay alive. When the diet was looked at at weeks 4 to 9 this had less influence. Part of the outcome was achieved by early growth, but the overall effect was mainly due to the direct effect of early nutrition.3
Another study comparing premature infants shows that higher fat and protein intake resulted in higher total rest metabolism and lower rest metabolism per complete body weight. In short, malnutrition in early life increases metabolism at a later age and consequently requires more energy to survive.4
Research has also been carried out on adult prematures with a low birth weight indicating that their rest metabolism per body weight is higher than in time-born. Socio-economic status, lifestyle, fat percentage, smoking had no influence on this. It is possible that prematures on the metabolic (dust) surface have more active tissue. This may ultimately have a positive effect on the prevention of overweight and hence various chronic diseases associated with it.5
In summary, the metabolism at rest in adult prematures depends on the diet in the first three weeks. This is higher compared to time-borns. In the base the adult premature consumes more energy. All other tasks will be added to this.
Sleep: breathing asleep
Sleep can also affect the energy level. Bad sleep can have several causes. It can be caused by stress, screen usage, irregular working, sleep apnea (breath stops). According to research, adult prematures have a greater risk of snoring, breathing problems due to lung damage and other sleep-distorting breathing problems. This may cause more fatigue during the day.6
Early birth disorders:
Other conditions such aslung damage due to premature birth, brain damage, heart problems and various other diseases arising from early birth increase energy consumption. The body must already make more effort to accomplish the simple tasks, which of course takes more energy than usual.
What can you do?
There are many different ways to work on the energy level. This can be done together, for example, with a psychosomatic therapist or a sleeping therapist. In any case, it is important to exclude physical causes and always consult the general practitioner in case of doubt. In addition, it may be good to talk to the environment about the energy level and to take these people into what is and is not possible. Also for the adult premature itself it is good to learn to recognize their own boundaries, although this can often be difficult.
Practically, resting on a regular basis (no telephone or television) can already help, especially in combination with an exercise such as autogenic training. This is a relaxation exercise in which your body gets orders like it can feel warm and heavy. For this exercise it is only important to listen and the body automatically knows what to do. Other exercises can also be helpful. Certain exercises such as autogenic training can help to charge the battery. By doing the exercise regularly and taking regular rest you can build up reserves in the battery. This will give you more energy and leave you at the end of the day.
Below you will find the exercises:

Sources:
- IC Nutrition Directive in adults (2024):https://directivedatabase.nl/directive/food on the intensive care on adults/energy metabolism monitors.html
- Mason, J. B. (2010)Nutritional assessment and management of the malnourized patient. From: Sleisenger and Fordtran likewise Gastrointestinal and Liver Disease.
- Matinolli H. et al. (2017)Neonatal Nutrition Predicts Energy Balance in Young Adults Born Preterm at Very Low Birth Weight.
- Matinolli H. et al. (2015)Early Protein Intake Is Associated with Body Composition and Resting Energy Expenditure in Young Adults Born with Very Low Birth Weight.
- Sipola Leppänen, M. (2011)Resting Energy Expenditure in Young Adults Born Preterm—The Helsinki Study of Very Low Birth Weight Adults.
- Sanchez-Solano, N. J. et al. (2025)Sleep-disordered breathing in a multiethnic cohort of preterm adoscelents and adults: Assessment of neonatal and sequential risk factors.





