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Should You (or Should You Not) Be Working Out on an Empty Stomach?

Should You (or Should You Not) Be Working Out on an Empty Stomach?

As the amount of fitness information available is getting bigger, the chances of being exposed to bad advice are also growing, creating more fitness myths than ever. Yet, one of the most debatable myths that has been out there forever is the myth of working out on an empty stomach.

It has been a prevailing thought for decades that you shouldn’t eat or drink prior to working out, and it seems that only recently the public has started questioning its accuracy.

“Fasted” versus “Fed”

The common belief of the effectiveness of the “hungry workout” isn’t unsupported; actual research backs it up. The British Journal of Nutrition[1] and the International Journal of Sports Nutrition and Exercise Metabolism both published studies that show data in favor of “fasted” as opposed to “fed” training when it comes to the percentage of fat lost per workout.[2]

Additionally, a study published in the European Journal of Applied Physiology shows that fasted training provides a better anabolic post workout response to weight training, meaning it provides a better environment for building lean mass.

Namely, the conclusions indicate that “prior fasting may stimulate the intramyocellular [stored fats] anabolic response to ingestion of a carbohydrate/protein/leucine mixture following a heavy resistance training session.”[3]

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Moreover, by providing better absorption of the post workout meal nutrients, fasted training has the great potential to improve insulin sensitivity, and is, therefore, an important agent in the fat loss process.

As insulin sensitivity shows how easily fat and muscle cells in our body take in glucose, regulating insulin sensitivity helps lower the blood sugar levels, which is one of the most important factors in weigh loss. The Journal of Physiology published a study[4] that shows significantly greater insulin sensitivity improvement for the fasted training group as opposed to fed training group.

Finally, fasted training proved beneficial to endurance performance. In a study[5] published in the Journal of Strength and Conditional Research, ten professional cyclists maintained lean mass, lowered fat mass, and maintained performance.

Why fed training is better?

However, there is another side to the story that trumps the beliefs of efficacy of fasted workouts. As sports dietetics specialist Kelly Pritchett, Ph.D., R.D. explains, while the body’s response to a high-intensity fasted workout is to burn glycogen, the stored up carbohydrates, eventually, the body starts to adjust to the new system and starts storing fat from the next meal and burning less calories in order to compensate.[6]

Additionally, a study[7] published in the American Journal of Clinical Nutrition shows no benefits of fasting, since longer periods of avoiding food showed a decrease in resting metabolic rates (calories burned per unit of time, a day usually.)

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What’s more, fed training actually helps reduce appetite later in the day, as a study[8] in the journal Appetite shows. Whereas both fed and fasted training participants were expanding the same amount of energy throughout the day, the fed training participants experienced lessened appetite later on, which means less snacking or overeating later in the day, which is great news for anyone who wants to lose weight.

Although it may seem (according to scientific data) that fasted exercise provides better results, later and more extensive research shows the opposite is true.

As far as the fat burning capacity of fasted training is concerned, while it is accurate to some point, on the other hand it is proven to be counterproductive.

Namely, throughout the course of a high-intensity fasted workout, having no more fat to burn, the body starts to burn muscle instead. As another study[9] published in the European Journal of Physiology shows, during high-intensity training, without prior eating, the body relies on burning muscle proteins for energy, which is certainly an unwanted scenario for both professional athletes, and people who are just trying to shed some weight and feel better.

Another important benefit of fed training is that it gives you the ability to improve at a steady rate, which is impossible to achieve through a fasted workout regimen, as a study[10] from the Journal of Science and Medicine in Sport shows. Being able to push yourself a little bit further each time, and outperform your previous training, isn’t feasible with fasted training since your body lacks the energy to rely on for additional strength. By eating a light meal before your workout, your body will be provided with enough energy to help you perform a little better each time.

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As the study concludes, “meal ingestion prior to daily exercise can modify some of the exercise training-induced adaptations normally seen with endurance training compared to when daily exercise is undertaken in the overnight-fasted state.”

How Fed training affects fat loss

When it comes to burning fat, the results are more favorable for the fed training method. As another study[11] in the International Journal of Sport Nutrition and Exercise Metabolism shows, physical activity after a light meal is far more effective for fat loss.

The study analyzed the effect on oxygen consumption (VO2) and substrate utilization (how our bodies burn fats and carbs), estimated by the respiratory-exchange ratio (RER) in eight young healthy men who were exposed to the same moderate-intensity workout. The results showed that breakfast increased both VO2 and RER significantly, and more importantly, the difference was still significant 24 hours after exercise. This means that fed training increases lipid utilization (the breaking down of fat cells), which is essential for weight loss.

Another study[12] in the Journal of the International Society of Sports Nutrition has managed to completely refute the belief that fat loss is much faster throughout fasting training, as the results showed no significant difference in weight loss between women who ate a meal-replacement shake before working out and those who performed training without any meal.

Conclusions

All research considered, a fed workout actually has more scientifically proven benefits to overall health, fitness, weight loss, and workout performance, as opposed to fasted training. It may seem like fasted training aids in body fat loss, but in the long run, it actually has counterproductive effects, as the body starts to store fat and burn less calories as a precaution.

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Additionally, the studies show far greater and longer effects on burning body fat with fed training than those of a fasted. Moreover, the decreased appetite shown in groups who performed fed training is another reason for people who want to shed some weight to enjoy a light meal before a workout in order to prevent later cravings.

Finally, for reaching new higher goals in fitness and training, a fed workout is again a much more productive option, since the calories provide enough energy for extra effort.

Featured photo credit: Pixabay via pixabay.com

Reference

[1] The British Journal of Nutrition: Breakfast and exercise contingently affect postprandial metabolism and energy balance in physically active males
[2] The International Journal of Sports Nutrition and Exercise Metabolism: Effects of fed- versus fasted-state aerobic training during Ramadan on body composition and some metabolic parameters in physically active men
[3] European Journal of Applied Physiology: Increased p70s6k phosphorylation during intake of a protein–carbohydrate drink following resistance exercise in the fasted state
[4] Journal of Physiology: Training in the fasted state improves glucose tolerance during fat-rich diet
[5] Journal of Strength and Conditional Research: Effects of caloric restriction and overnight fasting on cycling endurance performance
[6] DailyBurn: Intermittent Fasting: Should You Exercise on Empty?
[7] American Journal of Clinical Nutrition: Alternate-day fasting in nonobese subjects: effects on body weight, body composition, and energy metabolism
[8] Appetite: Appetite, energy intake and resting metabolic responses to 60 min treadmill running performed in a fasted versus a postprandial state
[9] European Journal of Physiology: Training in the fasted state facilitates re-activation of eEF2 activity during recovery from endurance exercise
[10] Journal of Science and Medicine in Sport: Adaptations to skeletal muscle with endurance exercise training in the acutely fed versus overnight-fasted state
[11] International Journal of Sport Nutrition and Exercise Metabolism: Exercising fasting or fed to enhance fat loss? Influence of food intake on respiratory ratio and excess postexercise oxygen consumption after a bout of endurance training
[12] Journal of the International Society of Sports Nutrition: Body composition changes associated with fasted versus non-fasted aerobic exercise

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Last Updated on March 30, 2020

Why You’re Feeling Tired All the Time (And What to Do About It)

Why You’re Feeling Tired All the Time (And What to Do About It)

Feeling tired all the time?

Have you ever caught yourself nodding off when you’re watching TV, listening to someone drone on during a meeting or even driving a car?

I know I have, especially when I worked 70 hours per week as a High-Tech Executive.

Feeling tired all the time may be more widespread than you think. In fact, two-fifths of Americans are tired most of the week.[1]

If you’re tired of feeling tired, then I’ve got some great news for you. New research is helping us gain critical insights into the underlying causes of feeling tired all the time.

In this article, we’ll discuss the latest reasons why you’re feeling tired all the time and practical steps you can take to finally get to the bottom of your fatigue and feel rested.

What Happens When You’re Too Tired

If you sleep just two hours less than the normal eight hours, you could be as impaired as someone who has consumed up to three beers.[2] And you’ve probably experienced the impact yourself.

Here are some common examples of what happens when you’re feeling tired:[3]

  • You may have trouble focusing because memory and learning functions may be impaired within your brain.
  • You may experience mood swings and an inability to differentiate between what’s important and what’s not because your brain’s neurotransmitters are misfiring.
  • You may get dark circles under your eyes and/or your skin make look dull and lackluster in the short term and over time your skin may get wrinkles and show signs of aging because your body didn’t have time to remove toxins during sleep.
  • You may find it more difficult to exercise or to perform any type of athletic activity.
  • Your immune system may weaken causing you to pick up infections more easily.
  • You may overeat because not getting enough sleep activates the body’s endocannabinoids even when you’re not hungry.
  • Your metabolism slows down so what you eat is more likely to be stored as belly fat.

Are you saying that feeling tired can make me overweight?

Unfortunately, yes!

Feeling tired all the time can cause you to put on the pounds especially around your waist. But it is a classic chicken and egg situation, too.

Heavier people are more likely to feel fatigued during the day than lighter ones. And that’s even true for overweight people who don’t have sleep apnea (source: National Institutes of Health).

Speaking of sleep apnea, you may be wondering if that or something else is causing you to feel tired all the time.

Why Are you Feeling Tired All the Time?

Leading experts are starting to recognize that there are three primary reasons people feel tired on a regular basis: sleep deprivation, fatigue and Chronic Fatigue Syndrome (CFS).

Here’s a quick overview of each root cause of feeling tired all of the time:

  1. Tiredness occurs from sleep deprivation when you don’t get high-quality sleep consistently. It typically can be solved by changing your routine and getting enough deep restorative sleep.
  2. Fatigue occurs from prolonged sleeplessness which could be triggered by numerous issues such as mental health issues, long-term illness, fibromyalgia, obesity, sleep apnea or stress. It typically can be improved by changing your lifestyle and using sleep aids or treatments, if recommended by your physician.
  3. Chronic Fatigue Syndrome (CFS) is a medical condition also known as Myalgic Encephalomyelitis that occurs from persistent exhaustion that doesn’t go away with sleep.

The exact cause of CFS is not known, but it may be due to problems with the immune system, a bacterial infection, a hormone imbalance or emotional trauma.

It typically involves working with a doctor to rule out other illnesses before diagnosing and treating CFS.[4]

Always consult a physician to get a personal diagnosis about why you are feeling tired, especially if it is a severe condition.

Feeling Tired vs Being Fatigued

If lack of quality sleep doesn’t seem to be the root cause for you, then it’s time to explore fatigue as the reason you are frequently feeling tired.

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Until recently, tiredness and fatigue were thought to be interchangeable. Leading experts now realize that tiredness and fatigue are different.

Tiredness is primarily about lack of sleep.

But fatigue is a perceived feeling of being tired that is much more likely to occur in people who have depression, anxiety or emotional stress and/or are overweight and physically inactive (source: Science Direct).

Symptoms of fatigue include:

  • Difficulty concentrating
  • Low stamina
  • Difficulty sleeping
  • Anxiety
  • Low motivation

These symptoms may sound similar to those of tiredness but they usually last longer and are more intense.

Unfortunately, there is no definitive reason why fatigue occurs because it can be a symptom of an emotional or physical illness. But there are still a number of steps you can take to reduce difficult symptoms by making a few simple lifestyle changes.

How Much Sleep Is Enough?

The number one reason you may feel tired is because of sleep deprivation which means you are not getting enough high-quality sleep.

Most adults need 7 to 9 hours of high-quality, uninterrupted sleep per night. If you’re sleep deprived, the amount of sleep you need increases.

So, quantity and quality do matter when it comes to sleep.

The key to quality sleep is being able to get long, uninterrupted sleep cycles throughout the night. It typically takes 90 minutes for you to reach a state of deep REM sleep where your body’s healing crew goes to work.

Ideally, you want to get at least 3 to 4 deep REM sleep cycles in per night. That’s why it’s so important to stay asleep for 7 or more hours.

Research also shows that people who think they can get by on less sleep don’t perform as well as people who get at least seven hours of sleep a night[5] So, you should definitely plan on getting seven hours of deep restorative sleep every night.

If you are not getting 7 hours of high-quality sleep regularly, then sleep deprivation is most likely reason you feel tired all the time.

And that is good news because sleep deprivation is much simpler and easier to address than the other root causes.

It’s also a good idea to rule out sleep deprivation as the reason why you are tired before moving on to the other possibilities such as fatigue or Chronic Fatigue Syndrome, which may require a doctor for diagnosis and treatment.

4 Simple Changes to Reduce Fatigue

Personally, I’m a big believer in upgrading your lifestyle to uplift your life. I overcame chronic stress and exhaustion by making these four changes to my lifestyle:

  1. Eating healthy, home-cooked meals versus microwaving processed foods or eating out
  2. Exercising regularly
  3. Using stressbusters
  4. Creating a bedtime routine to sleep better

So, I know it is possible to change your lifestyle even when you’re working crazy hours and have lots of family responsibilities.

After I made the 4 simple changes in my lifestyle, I no longer felt exhausted all of the time.

In addition, I lost two inches off my waist and looked and felt better than ever.

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I was so excited that I wanted to help others replace stress and exhaustion with rest and well-being, too. That’s why I became a Certified Holistic Wellness Coach through the Dr. Sears Wellness Institute.

Interestingly enough, I discovered that Dr. Sears recommends a somewhat similar L.E.A.N. lifestyle:

  • L is for Lifestyle and means living healthy including getting enough sleep.
  • E is for Exercise and means getting at least 20 minutes of exercise a day ideally for six days a week.
  • A is for Attitude and means thinking positive and reducing stress whenever possible.
  • N is for Nutrition and means emphasizing a right-fat diet, not a low-fat diet.

The L.E.A.N. lifestyle is a scientifically-proven way to reduce fatigue, get to the optimal weight and to achieve overall wellness.[6]

And yes, there does seem to be an important correlation between being lean and feeling rested.

But overall based on my personal experience and Dr. Sear’s scientific proof, the key to not feeling tired all of the time does seem to be 4 simple changes to your lifestyle.

L — Living Healthy

Getting enough high-quality sleep every day is the surefire way to help you feel less fatigued, more rested and better overall.

So, whether you’re sleep deprived or potentially suffering from fatigue or Chronic Fatigue Syndrome, you probably want to find a way to sleep better.

In fact, if you aren’t getting enough sleep, your body isn’t getting the time it needs to repair itself; meaning that if you are suffering from an illness, it’s far more likely to linger.

As unlikely as it sounds, though, fatigue can sometimes make it difficult to sleep. That’s why I’d recommend taking a look at your bedtime routine before you go to bed and optimize it based on sleep best practices.

Here are 3 quick and easy tips for creating a pro-sleep bedtime routine:

1. Unplug

Many of us try to unwind by watching TV or doing something on an iPhone or tablet. But tech can affect your melatonin production due to the blue light that they emit, fooling your body into thinking it’s still daytime.

So turn off all tech one hour before bed and create a tech-free zone in your bedroom.

2. Unwind

Do something to relax.

Use the time before bed to do something you find relaxing such as reading a book, listening to soothing music, meditating or taking an Epsom salt bath.

3. Get Comfortable

Ensure your bed is comfortable and your room is set up for sleep.

Make sure you room is cool. 60-68 degrees is the ideal temperature for most people to sleep.

Also, it’s ideal if your bedroom is dark and there is no noise.

Finally, make sure everything is handled (e.g., laying out tomorrow’s clothes) before you get into your nice, comfy bed.

If your mind is still active, write a to-do list to help you fall asleep faster.[7]

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Above all, be gentle with yourself and count your blessings, some sheep or whatever helps.

This article also offers practical tips to build a bedtime routine: How to Build a Good Bedtime Routine That Makes Your Morning Easier

E — Exercise

Many people know that exercise is good for them, but just can’t figure out how to fit it into their busy schedules.

That’s what happened in my case.

But when my chronic stress and exhaustion turned into systemic inflammation (which can lead to major diseases like Alzheimer’s), I realized it was time to change my lifestyle.

As part of my lifestyle upgrade, I knew I needed to move more.

My friends who exercise all gave me the same advice: find an exercise you like to do and find a specific time in your schedule when you can consistently do it.

That made sense to me.

So, I decided to swim.

I used to love to swim when I was young, but I hadn’t done it for years. The best time for me to do it was immediately after work, since I could easily get an open swim lane at my local fitness club then.

Also, swimming became a nice reason for me to leave work on time. And I got to enjoy a nice workout before eating dinner.

Swimming is a good way to get your cardio or endurance training. But, walking, running and dancing are nice alternatives.

So find an exercise you love and stick to it. Ideally, get a combination of endurance training, strength training and flexibility training in during your daily 20-minute workout.

If you haven’t exercised in a while and have a lot of stress in your life, you may want to give yoga a try because you will increase your flexibility and lower your stress.

A — Attitude

Stress may be a major reason why you aren’t feeling well all of the time. At least that was the case with me.

When I worked 70 hours per week as a High-Tech Executive, I felt chronically stressed and exhausted. But there was one thing that always worked to help me feel calmer and less fatigued.

Do you want to know what that master stress-busting technique was?

Breathing.

But not just any old breathing. It was a special form of deep Yogic breathing called the “Long-Exhale Breathing” or “4-7-8 breathing” or “Pranayama” in Sanskrit).

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Here’s how you do “Long-Exhale Breathing”:

  1. Sit in a comfortable position with your spine straight and your hand on your tummy (so you know you are breathing deeply from your diaphragm and not shallowly from your chest)
  2. Breathe in deeply and slowly from your diaphragm with your mouth closed while you count to 4 (ideally until your stomach feels full of air)
  3. Hold your breath while you count to 7 mentally and enjoy the stillness
  4. Breathe out through your mouth with a “ha” sound while you count to 8 (or until your stomach has no more air in it)
  5. Pause after you finish your exhale while you notice the sense of wholeness and relaxation from completing one conscious, deep, long exhale breath
  6. Repeat 3 times ensuring your exhale is longer than your inhale so you relax your nervous system

This type of “long-exhale breathing” is scientifically proven to reduce stress.

When your exhale is twice as long as your inhale, it soothes your parasympathetic nervous system, which regulates the relaxation response.[8]

Plus, this is a great technique for helping you get to sleep, too.

N — Nutrition

Diet is vital for beating fatigue – after all, food is your main source of energy.

If your diet is poor, then it implies you’re not getting the nutrients you need to sustain healthy energy levels.

Eating a diet for fatigue doesn’t need to be complicated, time-consuming though.

For most people, it’s just a case of swapping a few unhealthy foods for a few healthier ones, like switching from low-fiber, processed foods to whole, high-fiber foods.

Unless your current diet is solely made up of fast food and ready meals, adjusting to a fatigue-fighting diet shouldn’t be too much of a shock to the system.

Here’re 9 simple diet swaps you can make today:

  1. Replace your morning coffee with Matcha green tea and drink only herbal tea within six hours of bedtime.
  2. Add a healthy fat or protein to your any carb you eat, especially if you eat before bed. Please note that carb-only snacks lead to blood-sugar crashes that can make you eat more and they can keep you from sleeping.
  3. Fill up with fiber especially green leafy vegetables. Strive to get at least 25g per day with at least 5 servings (a serving is the size of your fist) of green vegetables.
  4. Replace refined, processed, low-fiber pastas and grains with zucchini noodles and whole grains such as buckwheat, quinoa, sorghum, oats, amaranth, millet, teff, brown rice and corn.
  5. Swap natural sweeteners for refined sugars and try to ensure you don’t get more than 25g of sugar a day if you are a woman and 30g of sugar a day if you are a man.
  6. Replace ice cream with low-sugar alternatives such as So Delicious Dairy-Free Vanilla Bean Coconut Ice Cream.
  7. Swap omega-6, partially-hydrogenated oils such as corn, palm, sunflower, safflower, cotton, canola and soybean oil for omega-3 oils such as flax, olive and nut oils.
  8. Replace high-sugar yoghurts with low-sugar, dairy-free yoghurts such as Kite Hill Plain Yoghurt with 1g sugar or Lifeway Farmer Cheese with 0g sugar.
  9. Swap your sugar-laden soda for sparkling water with a splash of low-sugar juice

Also, ensure your diet is giving you enough of the daily essential vitamins and minerals. Most of us don’t get enough Vitamin D, Vitamin B-12, Calcium, Iron and Magnesium. If you are low on any of the above vitamins and minerals, you may experience fatigue and low energy.

That’s why it’s always worth having your doctor check your levels. If you find any of them are low, then try to eat foods rich in them.

Alternatively, you might consider a high-quality multi-vitamin or specific supplement.

The Bottom Line

If you are tired of feeling tired, then there is tremendous hope.

If you are tired because you are not getting enough high-quality sleep, then the best remedy is a bedtime routine based on sleep best practices.

If you are tired because you have stress and fatigue, then the best remedy are four simple lifestyle changes including:

  • Enough High-Quality Sleep with Bedtime Routine
  • Regular Exercise You Love
  • Stress Reduction with Long-Exhale Breathing
  • Fatigue-Reducing Diet

Overall, adopting a healthier lifestyle Is the ideal remedy for feeling more rested and energized.

More Tips to Help You Rest Better

Featured photo credit: Cris Saur via unsplash.com

Reference

[1] YouGov: Two-fifths of Americans are tired most of the week
[2] National Safety Council: Is Your Company Confronting Workplace Fatigue?
[3] The New York Times: Why Are We So Freaking Tired?
[4] Mayo Clinic: Chronic fatigue syndrome
[5] Mayo Clinic: Lack of sleep: Can it make you sick?
[6] Ask Dr. Sears: The L.E.A.N. Lifestyle
[7] American Psychological Association: Getting a Good Night’s Sleep
[8] Yoga International: Learning to Exhale: 2-to-1 Breathing

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