Feeling tired from time to time is part of normal life. A busy week, a poor night’s sleep or a particularly demanding period can all leave you feeling more drained than usual.
But when tiredness becomes persistent, it can start to affect concentration, motivation, exercise, work and everyday life.
Fatigue can have many different causes. Sometimes it’s closely linked to lifestyle, sleep or stress. In other cases, there may be an underlying health or nutritional issue that needs appropriate assessment.
Understanding the factors that can influence energy levels is a useful starting point. Just as importantly, knowing when tiredness needs further investigation can help you take the right next step.
Common causes of fatigue
There isn’t always one simple explanation for feeling tired.
Common factors include:
- Not getting enough sleep or having disrupted sleep
- Stress and prolonged mental or emotional demands
- An inconsistent routine
- Poor nutrition or an unbalanced diet
- Dehydration
- Too little physical activity
- Doing more exercise than your body has had time to recover from
- Certain nutritional deficiencies
- Some illnesses, medicines or hormonal changes
These factors can also overlap. For example, a stressful period may affect your sleep, while poor sleep can then make it harder to manage your normal routine or exercise.
The NHS guidance on tiredness and fatigue explains that persistent or unexplained tiredness can sometimes be associated with an underlying medical condition and advises against self-diagnosis.
Sleep and energy
Sleep is one of the most obvious influences on how you feel during the day, but it is easy to underestimate its importance.
Going to bed at inconsistent times, regularly getting too little sleep or having a disrupted night’s sleep can all leave you feeling tired the following day.
It can help to establish a consistent sleep routine and give yourself enough time to sleep. Keeping your bedroom comfortable, reducing stimulation before bed and limiting screens close to bedtime may also be useful.
If you regularly wake feeling unrefreshed despite allowing enough time for sleep, or if someone has noticed loud snoring, gasping or choking during the night, it may be worth discussing this with your GP.
Stress, workload and mental fatigue
Energy isn’t only affected by physical activity.
Periods of sustained stress, demanding work, family responsibilities and simply having too much to think about can leave you feeling mentally and physically drained.
Stress can also affect sleep, eating habits and exercise, creating a cycle that makes fatigue harder to shake.
Rather than trying to make dramatic changes all at once, it can be more realistic to look at where your current routine is placing unnecessary demands on you.
Regular breaks, time away from screens, enjoyable activities, movement and protecting your sleep can all form part of a more sustainable routine.
Nutrition and energy levels
Your body needs a regular supply of nutrients and energy to function properly.
Eating a varied diet that includes sources of protein, carbohydrates, healthy fats, fruit and vegetables can help provide the nutrients your body needs.
It is also worth considering whether you are eating enough for your lifestyle. Someone who is exercising regularly, for example, may have considerably different nutritional requirements from someone who is less active.
Hydration matters too. Being dehydrated can contribute to feeling tired and generally unwell, particularly when combined with exercise, warm weather or a busy day.
A balanced diet is usually the best starting point rather than looking for a single food, vitamin or supplement to solve low energy.
Could a nutritional deficiency cause tiredness?
Some nutritional deficiencies can contribute to tiredness.
Vitamin B12 and folate are important for healthy red blood cell production and normal nervous system function. Vitamin B12 deficiency can be associated with tiredness, lack of energy and other symptoms.
Iron deficiency anaemia can also cause tiredness and lack of energy, alongside symptoms such as shortness of breath, palpitations and headaches.
However, feeling tired does not automatically mean that you have a vitamin or mineral deficiency.
This is an important distinction.
If fatigue is persistent or accompanied by other symptoms, appropriate medical assessment may be needed to establish what is causing it. For example, vitamin B12 deficiency can be investigated using symptoms and blood tests, while other causes of fatigue may require different investigations.
It is therefore better not to assume that a particular vitamin, supplement or treatment is the answer simply because tiredness is one of the symptoms associated with a deficiency.
Movement and physical activity
When you’re tired, exercise can sometimes feel like the last thing you want to do.
But regular physical activity can be an important part of supporting energy and general wellbeing. The key is finding an appropriate level rather than assuming that more exercise is always better.
A daily walk, regular mobility work, recreational sport or a structured training programme can all contribute to an active lifestyle.
At the same time, excessive training without sufficient recovery can leave you feeling run down.
If your training volume has increased significantly and you’re persistently tired, it may be worth looking at the balance between exercise, rest, sleep and nutrition rather than simply adding more training.
How to support your energy naturally
There is rarely one magic solution to low energy.
Instead, look at the fundamentals first.
Prioritise sleep
Try to establish a consistent sleep routine and give yourself enough time to rest.
Eat regularly and well
Aim for a varied, balanced diet that provides the energy and nutrients your body needs.
Stay hydrated
Make drinking regularly part of your normal routine, particularly around exercise and warmer weather.
Keep moving
Regular activity can support general wellbeing, even if that simply means getting outside for a walk each day.
Manage your workload
If you’re constantly operating at full capacity, consider where you can create more time for rest, recovery and activities that help you switch off.
Give your body time to recover
Training hard every day isn’t necessarily productive. Recovery is part of training, not something that only happens when you’ve finished it.
The NHS also recommends regular exercise, a healthy diet and consistent sleep habits as practical ways of supporting tiredness and fatigue.
When should persistent fatigue be checked?
This is one of the most important questions to ask.
If you’ve been tired for several weeks and don’t know why, if your fatigue is affecting everyday life, or if it is accompanied by other symptoms, it is sensible to speak to your GP or another appropriate healthcare professional.
The NHS specifically advises seeking medical advice where tiredness has persisted, is affecting daily life or occurs alongside symptoms such as unexplained weight loss or changes in mood.
This is particularly important because fatigue is a symptom rather than a diagnosis.
Trying to treat the symptom without understanding what is causing it may not address the underlying issue.
Supporting your wellbeing in Worcester
At Arya Clinic in Lower Wick, Worcester, we take a consultation-led approach to wellness.
That means looking at your individual circumstances rather than assuming that the same approach is appropriate for everyone.
Our Wellness services include a range of options designed to support different aspects of physical wellbeing, alongside Sports Therapy and Sports Massage.
Where appropriate, a consultation can help you understand what services may be relevant to your goals and circumstances.
If you have persistent, unexplained or concerning symptoms, however, appropriate medical or GP assessment should come first.
You can explore Wellness at Arya Clinic or arrange a consultation if you’d like to discuss your options.
A practical approach to improving energy
If you’re feeling more tired than usual, start with the basics.
Look at your sleep, nutrition, hydration, activity levels, training load and stress. Small, sustainable improvements can be more useful than trying to change everything at once.
But if fatigue persists without an obvious explanation, don’t simply assume you need more sleep, more exercise or a particular supplement.
Understanding the reason for ongoing tiredness is important.
At Arya Clinic, our approach is built around understanding before treatment — with individual circumstances considered before any wellness service is recommended.
Further information
For reliable information about persistent fatigue and nutritional deficiencies, the NHS provides useful guidance:
