14/05/2026
Under-fueling is becoming more and more common not just for athletes but also for active individuals due to a number of reasons such as lack of education on proper nutrition, constant dieting due to society pressures and fear of eating more for actual energy demands due to fear of gaining weight to name a few.
First we look at acute signs you are under-fueling.
🪫Fatigue during training.
🪫Reduced performance.
🪫Poor recovery from training.
🪫Poor concentration.
🪫High levels of hunger.
Now improving fueling can sometimes be a simply fix of increasing overall food intake in both quality & quantity but in some situations it may be much deeper and develop into RED-S (Relative Energy In Sport) where one or more of amenorrhea, reduced bone density, cardiovascular, hormonal, growth & development, metabolic, digestive function, sleep, immune function, injury and psychological issues can be present.
Now if you feel from reading the above you are under-fueling. First step is increasing calories through increasing portions and/or adding more snacks/meals. However if you feel your symptoms are more serious and ongoing then it’s time to reach out to a professional.
It’s not normal to feel constantly fatigued, get frequently sick or lose your menstrual cycle if active. Start getting to know your body and monitor daily energy, performance in training, recovery and hunger and take the corrective action before it gets more serious.
Any questions don’t hesitate to drop a DM.