Fasting, eating earlier in the day or eating fewer meals – what works best for weight loss?
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Globally, one in eight people are living with obesity. This is an issue because excess fat increases the risk of type 2 diabetes, heart disease and certain cancers.
Modifying your diet is important for managing obesity and preventing weight gain. This might include reducing your calorie intake, changing your eating patterns and prioritising healthy food.
But is one formula for weight loss more likely to result in success than another? Our new research compared three weight-loss methods, to see if one delivered more weight loss than the others:
- altering calorie distribution – eating more calories earlier rather than later in the day
- eating fewer meals
- intermittent fasting.
We analysed data from 29 clinical trials involving almost 2,500 people.
We found that over 12 weeks or more, the three methods resulted in similar weight loss: 1.4–1.8kg.
So if you do want to lose weight, choose a method that works best for you and your lifestyle.
Eating earlier in the day
When our metabolism isn’t functioning properly, our body can’t respond to the hormone insulin properly. This can lead to weight gain, fatigue and can increase the risk of a number of chronic diseases such as diabetes.
Eating later in the day – with a heavy dinner and late-night snacking – seems to lead to worse metabolic function. This means the body becomes less efficient at converting food into energy, managing blood sugar and regulating fat storage.
In contrast, consuming calories earlier in the day appears to improve metabolic function.
However, this might not be the case for everyone. Some people naturally have an evening “chronotype”, meaning they wake up and stay up later.
People with this chronotype appear to have less success losing weight, no matter the method. This is due to a combination of factors including genes, an increased likelihood to have a poorer diet overall and higher levels of hunger hormones.
Eating fewer meals
Skipping breakfast is common, but does it hinder weight loss? Or is a larger breakfast and smaller dinner ideal?
While frequent meals may reduce disease risk, recent studies suggest that compared to eating one to two meals a day, eating six times a day might increase weight loss success.
However, this doesn’t reflect the broader research, which tends to show consuming fewer meals can lead to greater weight loss. Our research suggests three meals a day is better than six. The easiest way to do this is by cutting out snacks and keeping breakfast, lunch and dinner.
Most studies compare three versus six meals, with limited evidence on whether two meals is better than three.
However, front-loading your calories (consuming most of your calories between breakfast and lunch) appears to be better for weight loss and may also help reduce hunger across the day. But more studies with a longer duration are needed.
Fasting, or time-restricted eating
Many of us eat over a period of more than 14 hours a day.
Eating late at night can throw off your body’s natural rhythm and alter how your organs function. Over time, this can increase your risk of type 2 diabetes and other chronic diseases, particularly among shift workers.
Time-restricted eating, a form of intermittent fasting, means eating all your calories within a six- to ten-hour window during the day when you’re most active. It’s not about changing what or how much you eat, but when you eat it.
Animal studies suggest time-restricted eating can lead to weight loss and improved metabolism. But the evidence in humans is still limited, especially about the long-term benefits.
It’s also unclear if the benefits of time-restricted eating are due to the timing itself or because people are eating less overall. When we looked at studies where participants ate freely (with no intentional calorie limits) but followed an eight-hour daily eating window, they naturally consumed about 200 fewer calories per day.
What will work for you?
In the past, clinicians have thought about weight loss and avoiding weight gain as a simile equation of calories in and out. But factors such as how we distribute our calories across the day, how often we eat and whether we eat late at night may also impact our metabolism, weight and health.
There are no easy ways to lose weight. So choose a method, or combination of methods, that suits you best. You might consider
- aiming to eat in an eight-hour window
- consuming your calories earlier, by focusing on breakfast and lunch
- opting for three meals a day, instead of six.
The average adult gains 0.4 to 0.7 kg per year. Improving the quality of your diet is important to prevent this weight gain and the strategies above might also help.
Finally, there’s still a lot we don’t know about these eating patterns. Many existing studies are short-term, with small sample sizes and varied methods, making it hard to make direct comparisons.
More research is underway, including well-controlled trials with larger samples, diverse populations and consistent methods. So hopefully future research will help us better understand how altering our eating patterns can result in better health.
Hayley O’Neill, Assistant Professor, Faculty of Health Sciences and Medicine, Bond University and Loai Albarqouni, Assistant Professor | NHMRC Emerging Leadership Fellow, Bond University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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The Smartest Way To Get To 20% Body Fat (Or 10% For Men)
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20% body fat for women, or 10% for men, are suggested in this video as ideal levels of adiposity for most people. While we certainly do have wiggle-room in either direction, going much higher than that can create a metabolic strain, and going much lower than that can cause immune dysfunction, organ damage, brittle bones, and more.
This video assumes you want to get down to those figures. If you want to go up to those figures because you are currently underweight, check out: How To Gain Weight (Healthily!)
Look at the small picture
The main trick, we are told, is to focus on small, incremental changes rather than obsessing over long-term weight loss goals (e.g. 20% body fat for women, 10% for men).
Next, throw out what science shows doesn’t work, such as restrictive or extreme dieting:
- Restrictive dieting doesn’t work as the body will try to save you from starvation by storing extra fat and slowing your metabolism to make your fat reserves last longer
- Extreme dieting doesn’t work because no matter how compelling it is to believe “I’ll just lose it in this extreme way, then maintain my new lower weight”, the vast body of research shows that weight loss in this way will be regained quickly afterwards, and for a significant minority, may even end up putting more back on than was originally lost. In either case, you’ll have put your mind and body through the wringer for no long-term gain.
The recommendation comes in three parts:
- Shift your mindset: detach motivation from timelines and vanity goals; focus instead on lifelong health and sustainable habits.
- Use an analytical approach: apply engineering principles: collect honest data and identify bottlenecks. Track food intake consistently, even during slip-ups, to identify areas for improvement. You remember the whole “it doesn’t count if it’s from someone else’s plate” thing? These days with food trackers, a lot of people fall into “it doesn’t count if I don’t record it”, but a head-in-the-sand approach will not get you where you want to be.
- Tackle bottlenecks incrementally: focus on one small, impactful change at a time (e.g. reducing soda intake). This way, you can build habits gradually to prevent willpower burnout and sustain your progress.
As an example of how this looked for Viva (in the video):
- > 30% body fat stage: she focused on reducing processed foods and portion sizes.
- 29–25% body fat stage: she prioritized nutrient-dense foods and reduced dining out.
- 24–20% body fat stage: she added strength training, improved sleep, and addressed her cravings and energy levels.
In short: look at the small picture; adjust your habits mindfully, keep a track of things, see what needs improvement and improve it, and don’t try to speedrun weight loss; just focus on what you are tangibly doing to keep things heading in the right direction, and you’ll get there 1% at a time.
For more on all of this, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
Lose Weight, But Healthily ← our own guide, which is also consistent with the advice above, and talks about some specific things to pay attention to that weren’t mentioned in the video
Take care!
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An unbroken night’s sleep is a myth. Here’s what good sleep looks like
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What do you imagine a good night’s sleep to be?
Often when people come into our sleep clinic seeking treatment, they share ideas about healthy sleep.
Many think when their head hits the pillow, they should fall into a deep and restorative sleep, and emerge after about eight hours feeling refreshed. They’re in good company – many Australians hold the same belief.
In reality, healthy sleep is cyclic across the night, as you move in and out of the different stages of sleep, often waking up several times. Some people remember one or more of these awakenings, others do not. Let’s consider what a healthy night’s sleep looks like.
Bricolage/Shutterstock Sleep cycles are a roller-coaster
As an adult, our sleep moves through different cycles and brief awakenings during the night. Sleep cycles last roughly 90 minutes each.
We typically start the night with lighter sleep, before moving into deeper sleep stages, and rising again into rapid eye movement (REM) sleep – the stage of sleep often linked to vivid dreaming.
If sleeping well, we get most of our deep sleep in the first half of the night, with REM sleep more common in the second half of the night.
Deepest sleep usually happens during the first half of the night. Verin/Shutterstock Adults usually move through five or six sleep cycles in a night, and it is entirely normal to wake up briefly at the end of each one. That means we might be waking up five times during the night. This can increase with older age and still be healthy. If you’re not remembering these awakenings that’s OK – they can be quite brief.
What does getting a ‘good’ sleep actually mean?
You’ll often hear that adults need between seven and nine hours of sleep per night. But good sleep is about more than the number of hours – it’s also about the quality.
For most people, sleeping well means being able to fall asleep soon after getting into bed (within around 30 minutes), sleeping without waking up for long periods, and waking feeling rested and ready for the day.
You shouldn’t be feeling excessively sleepy during the day, especially if you’re regularly getting at least seven hours of refreshing sleep a night (this is a rough rule of thumb).
But are you noticing you’re feeling physically tired, needing to nap regularly and still not feeling refreshed? It may be worthwhile touching base with your general practitioner, as there a range of possible reasons.
Common issues
Sleep disorders are common. Up to 25% of adults have insomnia, a sleep disorder where it may be hard to fall or stay asleep, or you may wake earlier in the morning than you’d like.
Rates of common sleep disorders such as insomnia and sleep apnoea – where your breathing can partially or completely stop many times during the night – also increase with age, affecting 20% of early adults and 40% of people in middle age. There are effective treatments, so asking for help is important.
Beyond sleep disorders, our sleep can also be disrupted by chronic health conditions – such as pain – and by certain medications.
There can also be other reasons we’re not sleeping well. Some of us are woken by children, pets or traffic noise during the night. These “forced awakenings” mean we may find it harder to get up in the morning, take longer to leave bed and feel less satisfied with our sleep. For some people, night awakenings may have no clear cause.
A good way to tell if these awakenings are a problem for you is by thinking about how they affect you. When they cause feelings of frustration or worry, or are impacting how we feel and function during the day, it might be a sign to seek some help.
If waking up in the night is interfering with your normal day-to-day activities, it may indicate a problem. BearFotos/Shutterstock We also may struggle to get up in the morning. This could be for a range of reasons, including not sleeping long enough, going to bed or waking up at irregular times – or even your own internal clock, which can influence the time your body prefers to sleep.
If you’re regularly struggling to get up for work or family needs, it can be an indication you may need to seek help. Some of these factors can be explored with a sleep psychologist if they are causing concern.
Can my smart watch help?
It is important to remember sleep-tracking devices can vary in accuracy for looking at the different sleep stages. While they can give a rough estimate, they are not a perfect measure.
In-laboratory polysomnography, or PSG, is the best standard measure to examine your sleep stages. A PSG examines breathing, oxygen saturation, brain waves and heart rate during sleep.
Rather than closely examining nightly data (including sleep stages) from a sleep tracker, it may be more helpful to look at the patterns of your sleep (bed and wake times) over time.
Understanding your sleep patterns may help identify and adjust behaviours that negatively impact your sleep, such as your bedtime routine and sleeping environment.
And if you find viewing your sleep data is making you feel worried about your sleep, this may not be useful for you. Most importantly, if you are concerned it is important to discuss it with your GP who can refer you to the appropriate specialist sleep health provider.
Amy Reynolds, Associate Professor in Clinical Sleep Health, Flinders University; Claire Dunbar, Research Associate, Sleep Health, Flinders University; Gorica Micic, Postdoctoral Research Fellow, Clinical Psychologist, Flinders University; Hannah Scott, Research Fellow in Sleep Health, Flinders University, and Nicole Lovato, Associate Professor, Adelaide Institute for Sleep Health, Flinders University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Almonds vs Walnuts – Which is Healthier?
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Our Verdict
When comparing almonds to walnuts, we picked the almonds.
Why?
It wasn’t just our almond bias, but it was close!
In terms of macros, the main important differences are:
- Almonds are higher in protein
- Walnuts are higher in fats (they are healthy fats)
So far, so even.
In terms of vitamins, both are rich in many vitamins; mostly the same ones. However, walnuts have more of most of the B vitamins (except for B2 and B3, where almonds win easily), and almonds have more vitamin E by several orders of magnitude.
So far, so balanced.
Almonds have slightly more choline.
Almonds have a better mineral profile, with more of most minerals that they both contain, and especially, a lot more calcium.
Both nuts have [sometimes slightly different, but] comparable benefits against diabetes, cancer, neurodegeneration, and other diseases.
In summary
This one’s close. After balancing out the various “almonds have this but walnuts have that” equal-but-different benefits, we’re going to say almonds take first place by virtue of the better mineral profile, and more choline.
But: enjoy both!
Learn more
You might like this previous article of ours:
Why You Should Diversify Your Nuts
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If you’re worried about inflammation, stop stressing about seed oils and focus on the basics
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You’ve probably seen recent claims online seed oils are “toxic” and cause inflammation, cancer, diabetes and heart disease. But what does the research say?
Overall, if you’re worried about inflammation, cancer, diabetes and heart disease there are probably more important things to worry about than seed oils.
They may or may not play a role in inflammation (the research picture is mixed). What we do know, however, is that a high-quality diet rich in unprocessed whole foods (fruits, vegetables, nuts, seeds, grains and lean meats) is the number one thing you can to do reduce inflammation and your risk of developing diseases.
Rather than focusing on seed oils specifically, reduce your intake of processed foods more broadly and focus on eating fresh foods. So don’t stress out too much about using a bit of seed oils in your cooking if you are generally focused on all the right things.
What are seed oils?
Seed oils are made from whole seeds, such as sunflower seeds, flax seeds, chia seeds and sesame seeds. These seeds are processed to extract oil.
The most common seed oils found at grocery stores include sesame oil, canola oil, sunflower oil, flaxseed oil, corn oil, grapeseed oil and soybean oil.
Seed oils are generally affordable, easy to find and suitable for many dishes and cuisines as they often have a high smoke point.
However, most people consume seed oils in larger amounts through processed foods such as biscuits, cakes, chips, muesli bars, muffins, dipping sauces, deep-fried foods, salad dressings and margarines.
These processed foods are “discretionary”, meaning they’re OK to have occasionally. But they are not considered necessary for a healthy diet, nor recommended in our national dietary guidelines, the Australian Guide for Healthy Eating.
Seed oils often have a high smoke point.
Gleb Usovich/ShutterstockI’ve heard people say seed oils ‘promote inflammation’. Is that true?
There are two essential types of omega fatty acids: omega-3 and omega-6. These are crucial for bodily functions, and we must get them through our diet since our bodies cannot produce them.
While all oils contain varying levels of fatty acids, some argue an excessive intake of a specific omega-6 fatty acid in seed oils called “linoleic acid” may contribute to inflammation in the body.
There is some evidence linoleic acid can be converted to arachidonic acid in the body and this may play a role in inflammation. However, other research doesn’t support the idea reducing dietary linoleic acid affects the amount of arachidonic acid in your body. The research picture is not clear cut.
But if you’re keen to reduce inflammation, the best thing you can do is aim for a healthy diet that is:
- high in antioxidants (found in fruits and vegetables)
- high in “healthy”, unsaturated fatty acids (found in fatty fish, some nuts and olive oil, for example)
high in fibre (found in carrots, cauliflower, broccoli and leafy greens) and prebiotics (found in onions, leeks, asparagus, garlic and legumes)
low in processed foods.
If reducing inflammation is your goal, it’s probably more meaningful to focus on these basics than on occasional use of seed oils.
Choose foods high in fibre (like many vegetables) and prebiotics (like legumes).
Kiian Oksana/ShutterstockWhat about seed oils and heart disease, cancer or diabetes risk?
Some popular arguments against seed oils come from data from single studies on this topic. Often these are observational studies where researchers do not make changes to people’s diet or lifestyle.
To get a clearer picture, we should look at meta-analyses, where scientists combine all the data available on a topic. This helps us get a better overall view of what’s going on.
A 2022 meta-analysis of randomised controlled trials investigated the relationship between supplementation with omega-6 fatty acid (often found in seed oils) and cardiovascular disease risk (meaning disease relating to the heart and blood vessels).
The researchers found omega-6 intake did not affect the risk for cardiovascular disease or death but that further research is needed for firm conclusions. Similar findings were observed in a 2019 review on this topic.
The World Health Organization published a review and meta-analysis in 2022 of observational studies (considered lower quality evidence compared to randomised controlled trials) on this topic.
They looked at omega-6 intake and risk of death, cardiovascular disease, breast cancer, mental health conditions and type 2 diabetes. The findings show both advantages and disadvantages of consuming omega-6.
The findings reported that, overall, higher intakes of omega-6 were associated with a 9% reduced risk of dying (data from nine studies) but a 31% increased risk of postmenopausal breast cancer (data from six studies).
One of the key findings from this review was about the ratio of omega-3 fatty acids to omega-6 fatty acids. A higher omega 6:3 ratio was associated with a greater risk of cognitive decline and ulcerative colitis (an inflammatory bowel condition).
A higher omega 3:6 ratio was linked to a 26% reduced risk of depression. These mixed outcomes may be a cause of confusion among health-conscious consumers about the health impact of seed oils.
Overall, the evidence suggests that a high intake of omega-6 fatty acids from seed oils is unlikely to increase your risk of death and disease.
However, more high-quality intervention research is needed.
The importance of increasing your omega-3 fatty acids
On top of the mixed outcomes, there is clear evidence increasing the intake of omega-3 fatty acids (often found in foods such as fatty fish and walnuts) is beneficial for health.
While some seed oils contain small amounts of omega-3s, they are not typically considered rich sources.
Flaxseed oil is an exception and is one of the few seed oils that is notably high in alpha-linolenic acid (sometimes shortened to ALA), an omega-3 fatty acid.
If you are looking to increase your omega-3 intake, it’s better to focus on other sources such as fatty fish (salmon, mackerel, sardines), chia seeds, hemp seeds, walnuts, and algae-based supplements. These foods are known for their higher omega-3 content compared to seed oils.
The bottom line
At the end of the day, it’s probably OK to include small quantities of seed oils in your diet, as long as you are mostly focused on eating fresh, unprocessed foods.
The best way to reduce your risk of inflammation, heart disease, cancer or diabetes is not to focus so much on seed oils but rather on doing your best to follow the Australian Guide for Healthy Eating.
Lauren Ball, Professor of Community Health and Wellbeing, The University of Queensland and Emily Burch, Lecturer, Southern Cross University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Younger Next Year – by Chris Crowley & Dr. Henry Lodge
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Is it diet and exercise? Well, of course that’s a component. Specific kinds of exercise, too. But, as usual when we feature a book, there’s more:
In this case, strong throughout is the notion of life being a marathon not a sprint—and training for it accordingly.
Doing the things now that you’ll really wish you’d started doing sooner, and finding ways to build them into daily life.
Not just that, though! The authors take a holistic approach to life and health, and thus also cover work life, social life, and so forth. Now, you may be thinking “I’m already in the 80 and beyond category; I don’t work” and well, the authors advise that you do indeed work. You don’t have to revamp your career, but science strongly suggests that people who work longer, live longer.
Of course that doesn’t have to mean going full-throttle like a 20-year-old determined to make their mark on the world (you can if you want, though). It could be volunteering for a charity, or otherwise just finding a socially-engaging “work-like” activity that gives you purpose.
About the blend of motivational pep talk and science—this book is heavily weighted towards the former. It has, however, enough science to keep it on the right track throughout. Hence the two authors! Crowley for motivational pep, and Dr. Lodge for the science (with extra input from brain surgeon Dr. Hamilton, too).
Bottom line: if you want to feel the most prepared possible for the coming years and decades, this is a great book that covers a lot of bases.
Click here to check out “Younger Next Year” and get de-aging!
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I Will Make You Passionate About Exercise – by Bevan Eyles
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What this isn’t: a “just do it!” motivational pep-talk.
What this is:a compassionate and thoughtful approach to help non-exercisers become regular exercisers, by looking at the real life factors of what holds people back (learning from his own early failures as a coach, by paying attention now to things he inadvertently neglected back then), both in the material/practical and in the psychological/emotional.
Further, he gives a 10-step method, for those who would like to be walked through it by the hand, making the transition to exercising regularly (and as a leisure habit, rather than as a chore) as frictionless as possible.
The style is friendly and energetic, and very easy-reading throughout.
Bottom line: if you are someone who finds exercising to be a chore, this book can definitely help you “get from here to there” in terms of finding joy in it, and finding exercise even easier than not exercising. Yes, really.
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