Ask a room full of people if they’re feeling tired and you’ll probably see quite a few nodding heads. And for many of us, feeling tired is nothing new. The UK’s National Health Service (NHS) even has an acronym for this: TATT, or tired all the time.
Tired all the time syndrome is when you feel tired all the time — no surprises there. But despite the official-sounding name, TATT syndrome is probably something you can fix.
TATT syndrome is when you feel tired all the time. It’s an acronym used by the UK’s NHS, among others. Despite the official-sounding name, it’s not really a condition in its own right, but there are many things that can cause TATT syndrome.
It’s hard to determine how common TATT syndrome is. A 2023 meta-analysis published in Frontiers in Public Health looked at 91 studies and found 20% of adults felt fatigue lasting up to six months, while 10% felt fatigue lasting more than six months. That number jumped to more than 42% in specific occupations.
But this is likely an underestimation — fatigue affects many more people. Some research in that same meta-analysis suggests it can affect almost 70% of people, and the report also claims fatigue is one of the top five most frequently presented health complaints in primary care.
Determining the exact percentage of the population that is tired all the time is challenging due to the subjective nature of fatigue and variations in individual reporting and perception. Additionally, factors like differing lifestyles, health conditions, and lack of a standardized measurement for fatigue add to the complexity of accurately quantifying its prevalence.
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While there’s no official list, the common symptoms of TATT syndrome include:
TATT syndrome can be caused by many things, but the two biggest culprits are sleep debt and being out of sync with your circadian rhythm.
They can leave you feeling TATT independent of each other as well as together. And they can often coincide with other more obvious causes of tiredness, like stress or medical conditions, and make these problems worse or be obscured by them.
It’s easy to have sleep debt or be out of sync with your circadian rhythm as many of us don’t know how much sleep we individually need or are aware that getting out of sync can lead to low energy (or that it’s even something to be aware of in the first place).
Sleep debt is the running total of how much sleep you owe your body. The more sleep debt you have, the more tired you’re going to feel.
And even if you got a full night’s sleep last night, lingering sleep debt from previous nights can still leave you feeling tired.
You might have built up sleep debt if you’ve been working long hours, getting up in the night with a newborn, or if you purposefully stay up late to get some more me-time (aka revenge bedtime procrastination).
Poor sleep hygiene — the daily behaviors that impact your sleep — can also cause you to wrack up sleep debt. This can include drinking coffee too late in the day, using alcohol to help you drift off (it wakes you up in the night), or not getting enough bright light during the day. These habits can also affect your energy levels independently of sleep.
You may also have sleep debt or without even realizing it if you don’t know how much sleep you need. And you might need more sleep than you think.
The amount of sleep you need is known as your sleep need. The seven-to-nine-hour guideline is just that: a guideline. In reality, we all have different sleep needs that can vary quite a bit.
For example, when we compared the sleep needs of 1.95 million RISE users aged 24 and up and found it ranged from five hours to 11 hours 30 minutes, and 48% of users needed eight hours of sleep or more a night.
Check RISE to find out how much sleep you need and how much sleep debt you have.
We also cover how to find out how much sleep you need here.
You also, unfortunately, can’t hack sleep and get more sleep in less time, or rely on good quality sleep to make up for too little quantity. And all sleep stages are important for maximum energy each day. So if you’ve been trying to shortcut a good night’s sleep, you might have sleep debt making you feel TATT.
It’s not just about getting enough sleep, though. Research from 2020 suggests how you feel about your sleep is a strong predictor of fatigue levels. So you want to get sleep you feel good about — that’ll be natural, unbroken sleep at the right time for your body (more on that next).
As one RISE user puts it, “been using this app for the last week and it’s really helped me get a grip on why I feel tired most of the time. I had no idea about sleep debt or how little late nights here and there really add up.” Read the review.
RISE users on iOS 1.202 and above can view their sleep need here and view their sleep debt here.
Your circadian rhythm is your internal body clock. It helps to dictate your sleep-wake cycle, when your body temperature fluctuates, and when your body produces certain hormones, among other things. It’s a complex system that thrives on consistency in our sleep times, light exposure, and meal and exercise times.
Being out of sync with your circadian rhythm can lead to low energy, trouble sleeping, impaired mental performance, and mental and physical health problems — all of which could contribute to feeling drained all day long.
You can get out of sync with your circadian rhythm by:
Beyond these two main culprits, there are many other reasons you may always feel tired. Many of these can cause you to build up sleep debt and get out of sync with your circadian rhythm, adding to or causing that TATT feeling. This can create a vicious cycle of worsening sleep and fatigue.
And you may be affected by more than one of these factors, making it tricky to figure out what exactly is causing your tiredness. Luckily, lowering your sleep debt and getting in sync with your circadian rhythm should always help.
Here’s what could be causing you to feel TATT:
We’ve covered more reasons you’re always tired here.
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You can treat TATT syndrome by lowering your sleep debt and getting in sync with your circadian rhythm. These are the two biggest factors affecting your energy levels.
Working on these two things will be the starting point to getting more energy, both because most of us have either sleep debt or are out of sync with our circadian rhythms (or both), but also because any improvements you make will likely positively impact other causes of feeling TATT.
The good news about sleep debt is you can pay it back.
We found RISE users with more than five hours of sleep debt are able to reduce this by two hours within the first two weeks of using the app.
Lower your sleep debt as much as possible to feel more energy each day.
You can lower your sleep debt by:
We’ve covered more advice on catching up on sleep here.
Sync up with your circadian rhythm to boost your energy levels and have an easier time getting enough sleep, which will (you guessed it) also boost your energy levels.
You can sync up by:
Check RISE for a daily prediction of your circadian rhythm. You can see when your body wants to wake up, wind down for bed, and go to sleep. Do your best to sync up with these times.
Expert tip: Being more aware of your circadian rhythm can help you make the most of the energy you do have, even when you’re always tired. RISE predicts when your energy levels will fluctuate across the day as part of your circadian rhythm. Schedule your most important daily tasks — think presentations, writing, and decision-making — for energy peaks, and easier tasks — think admin, emails, or taking a nap — for energy dips.
Lower your sleep debt to make these peaks higher and dips more manageable, and keep a regular sleep schedule to keep them at predictable times.
RISE users on iOS 1.202 and above can see their circadian rhythm on the Energy screen here.
Sleep hygiene are the daily behaviors that affect your sleep. By improving your sleep hygiene, you should have an easier time falling and staying asleep — which will help you keep sleep debt low and stay in sync with your circadian rhythm. And many of these behaviors will help you feel less tired during the day independent of sleep debt and your circadian rhythm.
Here’s what to do:
You might not even realize how much these habits can cause poor sleep and therefore low energy levels.
To stay on top of it all, RISE sends you reminders to do 20+ sleep hygiene habits at the ideal times for your circadian rhythm each day. This makes the habits even more effective.
We’ve covered more advice on how to stop feeling tired here.
RISE users on iOS 1.202 and above can set up their 20+ in-app habit notifications here.
Heads-up: If you’re experiencing extreme fatigue, speak to a healthcare provider about sleep disorders and physical and mental health conditions that could be to blame. They can recommend treatments, supplements, and medications to help.
Sleep debt and being out of sync with your circadian rhythm are the two biggest factors influencing your energy, and they could be the reason you’re feeling tired all the time. They can often coincide with and exacerbate other causes of feeling TATT and, because they’re linked, lowering your sleep debt and getting in sync with your circadian rhythm can help you manage other causes of tiredness.
Tired of feeling tired? RISE can help. RISE helps you lower your sleep debt and sync up with your circadian rhythm with personalized predictions and 20+ sleep hygiene reminders.
Users say RISE has helped them overcome their lack of energy:
“You need RISE if you’re always tired…I never realized how deprived of sleep and unregulated my sleeping pattern was and to my surprise, once it was fixed, I didn’t need coffee or a nap or anything else to have energy for the day.” Read the review.
And it doesn’t take long — 80% of RISE users feel more energy within five days.
RISE makes it easy to improve your sleep and daily energy to reach your potential
RISE makes it easy to improve your sleep and daily energy to reach your potential