Mental Fatigue

WHAT IS MENTAL FATIGUE?

Cognition is a term used to describe our mental abilities and processes. Simply put, these are the brain-based skills such as thinking and reasoning we use to perform simple and complex tasks.¹

Your brain gets tired in much the same way that your body does.¹⁰ So, too much cognitive activity over an extended period of time can send your brain into overdrive. This can leave you feeling mentally exhausted, what people sometimes refer to as ‘burnout’. In addition to slowing down your productivity and overall ability to pay attention and focus, it could also lead to more serious health issues.

Do you feel as though your brain is overloaded? Are you overwhelmed and mentally exhausted most of the time? All of us experience brain drain every so often, for example after a major exam or after preparing a financial report. But if you are consistently and excessively mentally tired, if the feeling never goes away, you could be suffering from mental fatigue.

WHAT CAUSES MENTAL FATIGUE?

Anything that requires a lot of mental energy can make you mentally tired in the short-term. Your brain is wired to deal with short-term stress but it does not react well to persistent, long-term stress. When you are stressed, your brain activates stress response hormones for pressurised situations that require quick thinking.² However, if your body’s stress response hormones are activated persistently over a longer period of time, your brain struggles to cope, leaving you feeling mentally fatigued.³

WHO IS AT RISK?

Often associated with workplace stress, mental fatigue can happen to anyone and can occur if you experience long-term stress in any area of your life. You could be at risk, for example if you are:³

Constantly making decisions⁴
Habitually working late⁵
Working in a demanding, high-pressure environment⁵
Experiencing ongoing financial stress⁵
Overcommitting to more tasks than you have time to finish⁴
Juggling work, family, school and friends
Dealing with life-changing circumstances such as divorce or the death of a loved one⁵

SIGNS AND SYMPTOMS

Signs and symptoms vary from person to person and often surface gradually. More importantly, if left unchecked over time mental fatigue can lead to anxiety or depression-like symptoms such as low mood and feeling down.³ Equally, people who suffer from mental fatigue often feel physically exhausted too, which may lead to physical health issues such as insomnia, digestive problems and a weakened immune system. ^{3, 6}

EMOTIONAL SIGNS MAY INCLUDE:

Depression
Anxiety
Cynicism or pessimism
Apathy (feeling of not caring)
Detachment
Anger / irritability / moodiness
Feeling of hopelessness
Feeling of dread
Lack of motivation
Low productivity
Difficulty concentrating³

PHYSICAL SIGNS MAY INCLUDE:

Headaches
Problems concentrating
Upset stomach
Body aches
Excessive tiredness
Changes in appetite
Insomnia
Weight gain or weight loss
Increased illness, such as colds and flu³

BEHAVIOURAL SIGNS MAY INCLUDE:

Poor performance at work
Social withdrawal or isolation
Inability to keep personal or work commitments
Low motivation
Poor decision-making and judgement
Calling in sick to work or school regularly³

DIAGNOSIS AND TREATMENT

As mental fatigue comes with a wide range of symptoms, diagnosis can be complex in some cases.⁸ Your doctor may look at your medical history, conduct a physical examination and run some blood tests, urine tests and x-rays to eliminate possible underlying medical causes.⁸ Fortunately, mental fatigue is treatable and there are various practical things you can do to help ease your symptoms and deal with stress.

LIFESTYLE CHANGES TO EASE MENTAL FATIGUE

Try decluttering your house and workspace – physical clutter can turn into headspace clutter ⁴
Become more organised and get into a routine – start with simple tasks like washing dishes after dinner every night and making your bed every morning when you get up
Learn to say ‘no’, take on fewer tasks, delegate and ask for help⁵
Find a balance between doing things efficiently and doing them perfectly – perfectionism can lead to decision paralysis or not being able to make decisions at all⁴
Get 7 to 9 hours of sleep a night – your brain cannot re-energise without regular sleep
Before going to bed, make a home and work to-do list for the following day but keep it doable and simple⁴
Take regular breaks throughout the day, take a stroll, get away on a vacation – even if it is for a couple of days a once or twice a year³
Learn to relax by practicing meditation or mindfulness – 20 minutes a day can change the way your body responds to stress and decrease your risk of other health issues^{3, 4}
Eat a balanced diet with a daily intake of fruit, vegetables, whole grains and lean proteins such as white fish, plain yoghurt, beans and lentils, lean beef and pork, white meat and poultry such as chicken and turkey, and eggs⁹
Exercise – even a brisk walk in your lunch hour is enough
Consider taking a natural supplement

Please note: This is educational information only and should not be used for diagnosis. For more information on mental fatigue, consult your healthcare professional.

Medical References

Sharp Brains. What are Cognitive Abilities and Skills, and How to Boost Them?

Available at: https://sharpbrains.com/blog/2006/12/18/what-are-cognitive-abilities/. Accessed on 6 March 2019.

Mayo Clinic. Job Burnout: How to spot it and take action.

Available at: https://www.mayoclinic.org/healthy-lifestyle/adult-health/in-depth/burnout/art-20046642. Accessed on 6 March 2019

How to Treat and Prevent Mental Exhaustion.

Available at: https://www.healthline.com/health/mental-exhaustion. Accessed on 6 March 2019.

How To Overcome Mental Fatigue, According To An Expert. Available at: https://www.forbes.com/sites/nomanazish/2018/09/25/how-to-overcome-mental-fatigue-according-to-an-expert/#d41627f16445. Accessed on 6 March 2019.
Medical News Today. Fatigue: Why am I so tired and what can I do about it? Available at: https://www.medicalnewstoday.com/articles/248002.php. Accessed on 6 March 2019.
University Health Network (UHN). Mental fatigue and what you can do about it. Available at: https://www.uhn.ca/PatientsFamilies/Health_Information/Health_Topics/Documents/Mental_Fatigue_and_What_You_Can_Do_About_It.pdf. Accessed on 6 March 2019. Accessed on 6 March 2019.
Symptoms of Mental Fatigue. Available at: https://www.livestrong.com/article/148147-symptoms-of-mental-fatigue/. Accessed on: 6 March 2019.
Fatigue. Available at: https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/fatigue. Accessed on 6 March 2019.
Top 13 Lean Protein Foods You Should Eat. Available at: https://www.healthline.com/nutrition/lean-protein-foods#section14. Accessed on 6 March 2019.
Global News. Are you suffering from mental fatigue? Here’s what to look for. Available at: https://www.healthline.com/nutrition/lean-protein-foods#section14. Accessed on 6 March 2019.
Wesnes KA, et al. Psychopharmacol Bull 1997;33(4):677-683.
Wesnes KA, et al. Psychopharmacology 2000;152(4):353-61.
Scholey AB, Kennedy DO. Hum Psychopharmacol 2002;17(1):35-44.
Kennedy DO, et al. Physiol Behav 2002;75(5):739-51.
Kwiecinski H, et al. Eur J Clin Res 1997;9:59-67.
Brinkley TE, et al. Am J Hypertens 2010;23:528–33.

Medical References

The information on this website is meant to give general knowledge only. It is not medical advice and should not replace advice, diagnosis, or treatment from a doctor. It also doesn’t set a specific way that care should be given.Always talk to your doctor or a qualified healthcare professional if you have any health questions or concerns. Don’t ignore or delay getting medical help because of something you read on this website.Medical information is always changing, so the details on this site—or any sites it links to—might not be fully accurate or up to date. You should not use this information to make medical decisions for yourself or others. If you do, you are doing so at your own risk.