Everywhere you look on TikTok and Instagram, there’s an influencer trying to push a new trend of some kind. In the wellness and fitness space, it’s often a new diet trend or a workout that the influencer swears helped tone up their body in 30 days. Or my favorite, the influencer walking around the supermarket aisles (sometimes shirtless) pointing out how everything you’re eating is killing you and how you should swap it for the item they’re selling instead. It may seem harmless to some to consume this type of content, but for others struggling with body image issues, recovering from eating disorders and even impressionable teens and pre-teens, it can have a more negative effect.
What makes this type of content more alarming is that it’s usually misinformation spread on platforms with large followings and by followers who trust the influencer and share their content. As a result, the internet gets filled with mixed messages about what’s true, false or an exaggerated claim.
Unfortunately, it’s hard to expect the average user to be able to decipher what is true from falsehood on social media when the same message is being shared over and over again. We spoke with experts in the wellness and fitness field on trends they want to de-influence as well as how to be able to spot false claims on social media.
The trends to de-influence
Food-restrictive diets and cleanses
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You’ve probably seen influencers pushing the keto and carnivore diet on social media. Although the keto diet has been shown to help patients with epilepsy, it isn’t necessarily the best approach for everyone to follow. Popular diets like keto and the carnivore diet focus on eliminating or limiting food groups like carbohydrates. “Very restrictive plans that totally eliminate food groups can lead to an unhealthy relationship with food and a very restrictive eating pattern,” warns Brittany Werner, a registered dietitian and director of an online nutrition coaching program at Working Against Gravity.
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Additionally, when you get rid of a whole food group, you put yourself at risk of nutritional deficiencies and digestive issues that occur because of an unbalanced gut microbiome. Diets like these are not sustainable in the long run and can lead to binge eating and increased cravings. “We should aim to eat a balanced diet with whole foods from all food groups like fruits, vegetables and whole grains to provide our body with vital micronutrients,” says Werner.
By now, you probably know that cleanses and detoxes aren’t recommended, but these methods are still being pushed. “Our bodies are naturally highly effective at eliminating waste and toxins, since the liver is the main filter for our body and breaks down toxins so they can be eliminated,” explains Werner. The kidneys also work as a filter system to catch and eliminate any additional waste through our urine.
“Often, cleanses or detoxes involve extreme measures such as drastic calorie restriction and diuretics that make you more susceptible to severe nutritional deficiencies and digestive issues,” Werner warns. Additionally, there is little peer-reviewed scientific research to back the effectiveness of any cleanse or detox. Instead, Werner advises following a balanced diet full of protein, fruits and vegetables to support your body’s natural detox system.
Dr. Will Bulsiewicz, the U.S. medical director at science and nutrition company ZOE, tells CNET that he’s observed parasite cleanses trending on TikTok. “According to TikTok, everyone has parasites and these parasites require a concoction of various supplements and concentrated herbs in order to eradicate,” he says. “Yet, as I sit here as a gastroenterologist, I’m left asking, ‘If everyone has parasites, why am I not detecting them on tests?’”
Bulsiewicz says he’s run hundreds of parasite tests through the years and remembers two instances when the test results were positive for parasites. “We live in a hyper-sterile society, so everything has been cleaned, scrubbed of any dirt or natural material and coated with chemicals to double- and triple-verify its cleanliness,” he explains. As a result, he points out that parasites are on the decline in the Western world. If you suspect you have parasites, make sure to see a professional to get properly evaluated instead of following an unlicensed influencer’s advice on social media.
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“Earning food” by going to the gym
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You’ve probably heard or said once before after a big meal that you need to burn off said calories. Believe it or not, the majority of our daily calorie burn does not come from a workout session or fitness class. “We’re burning far more calories walking, standing, climbing stairs, cooking and doing our daily acts of life than we do in our workouts,” explains Werner. That’s why thinking you can earn your food by burning off calories at the gym is flawed.
The gym offers benefits that go beyond burning calories. Instead, your daily workout should be used for muscle building and improving both your cardiovascular and mental health.
Protein Diet Coke and similar trends
You’ve probably seen the protein diet coke trend making the rounds across TikTok lately. With protein having a moment in the spotlight right now, it seems that people are constantly trying to find ways to sneak it into their diet — even if it is in carbonated form. According to Bulsiewicz, he can see why people would combine Diet Coke and protein shakes. “It makes sense, but as a gastroenterologist, what I see is a recipe for bloating and diarrhea because, at baseline, both drinks have ingredients known to trigger these symptoms,” he explains.
For example, Diet Coke has artificial sweeteners and carbonation, while the protein shake has protein isolates and usually has lactose from dairy. You should be mindful of that if you have a sensitive stomach and plan on trying social media trends such as this one.
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Fearmongering fitness advice targeting women
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One popular fitness stigma that seems to remain despite plenty of debunking is that lifting weights will make you bulky. The same thing applies when you see some Pilates content pushing the narrative that you’ll build long and lean muscles — when the reality is that you can’t change the length of your muscles. Miriam Fried, founder and head trainer at MF Strong in NYC, says that she’s also observed different forms of fearmongering based on hormonal health. “Fitness professionals without proper credentials are selling generic hormone balancing or menstrual cycle-syncing workouts, and women are being told they can only do low impact or intensity workouts.”
Dr. Anne Hussain, a naturopathic doctor and author of “The Period Literacy Handbook,” agrees and says the cycle-syncing, low-movement trend has gotten out of hand. She says there needs to be more encouragement for women and menstruators to move more by doing cardio and resistance training. “It’s a disservice to people to tell them to not engage in formal exercise for one to two weeks per month — that adds up to three to six months of the year!” she says, adding, “Instead, we need to make sure people are fueled well and get the support for any disruptive hormone-based symptoms so they can feel well and move more.”
Vibration plates and other fitness shortcuts
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If you’ve seen an uptick of fitness influencers pushing vibration plates in replacement for traditional workouts, you may want to think twice. Mike Julom, an ACE-certified personal trainer and founder of ThisIsWhyImFit.com, says vibration plates are not the magic fix people think they are. “Social media makes it look like standing on one or doing a few simple moves is enough to burn fat and build muscle, but studies show that’s not how it works,” he explains. He points out that just standing or doing some exercises on the vibration plates is not going to build muscle or burn calories similar to lifting weights or doing cardio.
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“They do have benefits like improving balance or helping blood flow, but it’s not enough if someone’s goal is to lose weight or get stronger,” Julom says, adding, “It’s mostly just a shortcut that doesn’t really pay off.” The truth is, if you are looking to lose body fat or build muscle, you will need to put in the work by strength training and doing cardio instead of relying on a vibrating plate or similar shortcut. This applies to any other trend you see on social media trying to push the idea that one piece of workout equipment is the magic fix to weight loss or to achieve a certain aesthetic.
Avoiding cortisol-spiking exercises
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If you’ve been on FitTok lately, you’ve probably seen some fitness influencers talking about the dangers of doing workouts that cause your cortisol levels to spike. Cortisol is known as the “stress hormone”, and it is released during high-intensity exercise or when you’re in “fight or flight” mode. Although too much cortisol isn’t good for you, FitTok takes it to the next level by fearmongering around workouts like HIIT.
Hussain says you shouldn’t rule out high-intensity exercise because it has plenty of benefits. “High-intensity exercise is immensely helpful for cardiovascular health, and we should be engaging in cardio and resistance training both to reap the overlapping and distinct benefits from each,” Hussain says.
Additionally, she points out that exercise helps with long-term cortisol regulation and supports mental health. Instead of adding barriers and discouraging people from engaging in high-intensity exercise, she advises influencers to encourage it since most people don’t meet the minimum exercise guidelines — 150 minutes of moderate-intensity physical activity per week for adults.
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The problem with these fitness and wellness
These are just some of the many fitness and wellness trends seen across TikTok that spread misinformation and confusion to users. Some may seem harmless, but the problem is more so with the ones that could potentially harm those who try to copy the trend. Nutrition misinformation can lead to unhealthy eating habits, nutrient deficiencies and other chronic health problems. Werner points out that it can also negatively impact our mental health.
“Misinformation and click-bait nutrition advice often target vulnerable populations that are desperate for help with their health and nutrition,” she says. As a result, these groups are more easily influenced by these unrealistic promises and fad diets. Additionally, misinformation tied to food and nutrition can often lead to guilt and fear surrounding eating. “Unsustainable plans can lead to binge eating and long-term body image and self-esteem issues,” Werner warns.
When it comes to fitness, women specifically are faced with contradicting messages about what they should or shouldn’t be doing in the gym. Fried says, “As a whole, women are an undertrained population — we get less activity across the span of our lifetimes than men.” As a result, this makes women more susceptible to osteoporosis (bone density loss) and sarcopenia (muscle loss) as they age, which puts them at higher risk of falling, getting injured and developing certain diseases.
“Exercise and strength training specifically can literally be life-changing and life-saving for women, so it can be incredibly frustrating as a fitness professional to see trends that further alienate women from training,” explains Fried.
How to tell what’s true or false on social media
Viewing posts, reels and videos on social media can seem like an echo chamber since you’re seeing the same information shared over and over again. You assume it must be true because it’s getting reposted by people you’re following and others. There’s also content that can contradict it as well. It only makes it harder to decipher what’s true from fiction if nothing is being verified. So, how can you use your best judgment?
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Bulsiewicz says it’s time to start challenging these influencers by asking them for evidence to support their claims. “If we want to discern truth, then we should be able to bring our information back to our gold standard source of truth, which is evidence — and TikTok is all about hacks,” Bulsiewicz points out. By asking influencers for the evidence, it will give you a better idea if they know what they’re talking about.
“If they point you to blog posts, other TikTok videos or a YouTube video, then they are simply regurgitating information that they found on the internet, contributing to the echo chamber and in my opinion, they’ve lost all credibility,” Bulsiewicz says. If they instead share a study to support their claims, Bulsiewicz says there are a few things to look out for with those sources. “If they point you to a research article, but it’s a test tube or a rat study, it’s not good enough because you don’t exist in a test tube, nor are you a rat.” Instead, he advises that the studies should be backed by human research, especially if you’re going to be doing something that affects your health.
“I think, ultimately, knowledge is power by finding quality sources of information we trust that can help arm us against misinformation when it sneaks up on our newsfeed,” says Fried. “I also think when it comes to fitness and health claims, approaching with a certain level of skepticism is important because anyone can claim anything.”
Bulsiewicz believes that what we consume on social media is a matter of personal responsibility. “You as an individual are under no obligation to accept what is presented to you, and I think we are far too quick to trust any and every thing that we hear from a social source.” Instead, he advises learning to discriminate and reject things that, from a common sense perspective, are nonsensical.
“We must learn to identify sources of truth and identify true experts who earn our trust because, at the end of the day, our health is one of the most valuable commodities that we have,” Bulsiewicz concludes.
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Final thoughts
Social media can be like the wild, wild west with all the information at your fingertips, but it’s important to approach it all with caution. If it seems too good to be true or promises that you’ll see a bodily difference in a matter of days by making a specific change, it’s most likely an exaggeration or a lie. If you’re uncertain about any information you spot on social media, speak with an expert offline who can better answer your questions and speak to the post’s validity.
You might know Chris Pontius as ‘Party Boy’ from the Jackass films and TV series that defined the early 2000s. Now 51, he’s back on our screens for Jackass: Best and Last, the fifth and final instalment in the franchise. Away from the stunts, though, Pontius has also become an unlikely source of practical fitness advice, regularly sharing workouts from his home gym.
In a recent Instagram Reel, he shared: ‘I have a very simple exercise tip for people who are having trouble getting motivated to exercise. Just lift the weight one time, do one rep, one push-up, whatever it is, and once you’ve started you kind of go, “Well, I might as well just keep going”.’
‘So try it, it’s worked for me every time and it’ll probably work for you,’ he says.
The advice is grounded in behavioural science. By taking one small step towards your workout, you’re more likely to overcome the initial mental resistance because the task feels more achievable. Once you’ve started, it’s far easier to build momentum and complete the rest of your session.
Our Fitness Director Explains Why This Method Works
‘There’s a bit of science behind this, too,’ says Andrew Tracey. ‘Behaviour-change researchers have looked at “all-or-nothing thinking” around exercise – basically, the idea that if you can’t do the full session, exactly as planned, you may as well sack it off completely. Giving yourself permission to do the smallest possible version of the workout is a way around that.
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‘Tell yourself you’re only doing the warm-up. Or one round. Or five minutes. You’re allowed to stop there. But often, once you’ve started, you realise the hard part wasn’t the workout itself. It was getting going. Research also shows that the way a workout feels can affect whether you come back for more. So a small win that feels doable is almost always better than the perfect session you never start. So while the “minimum dose” might feel like a cop-out, it could actually be a way in.’
If there’s one thing Kori Sampson knows, it’s how to optimise your body composition for performance. To tap into his knowledge as an elite athlete and coach, we asked him to create a 4-week plan to help you move faster, recover quicker and keep pushing when the fatigue sets in – all while improving your muscle-to-fat ratio.
Ready to build muscle, burn fat and come out the other side looking, feeling and performing better? Click here to get 14 days of free access to the plan via the Men’s Health app.
“Forget living longer, exercise can make life easier right now”—a 72-year-old fitness influencer and marathon runner shares two accessible ways to start moving
Retirement is often a time when people slow down, but in Christine Hobson’s case, she’s speeding up. When her daughter persuaded her to join a running club so she wouldn’t get bored, she had no idea she’d get the fitness bug and run 125 marathons in total, visiting all seven continents.
And the 72-year-old former teacher has plans to run the North Pole marathon in 2027.
Hobson, who believes that exercise is the best anti-aging hack, tells Fit&Well: “I think what makes you old is not doing anything and just being sedentary, sitting around watching TV all the time. I really believe the less you move, the less you’re able to move, so when I retired at almost 61, I decided that my new job was to get fit.
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“Aging isn’t just about age—if you make life easier now, the future will look after itself,” she says.
Hobson, who strength trains too, has since become a fitness influencer, amassing over 132,000 followers on Instagram, where she shares workouts and her thoughts on exercise.
“I get loads of messages from people who are scared to exercise because they don’t want to fall over and get injured,” she says. “But getting stronger builds your confidence and means that you can do the things you want without needing help. It’s not about living forever. And it’s never too late to start. You’ve got to start from where you are.”
Here shares her two best tips for getting started with fitness, whatever your age.
Start your week with achievable workout ideas, health tips and wellbeing advice in your inbox.
1. Perform the sit-to-stand exercise
Hobson says an essential exercise to incorporate into your day is the sit-to-stand—a move that involves sitting and standing up from a chair without using your hands.
To build your strength, Hobson suggests doing the sit-to-stand 10 times each time you walk past a chair in your house. Once you’ve got the technique, she recommends trying it from a lower chair or couch to make it more challenging.
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“The sit-to-stand is critical,” says Hobson. “If you can do that, that’s the thing that’s going to keep you independent in your own home. Because if you live alone and you can’t get up, then how are you going to look after yourself independently? The next thing will be that you can’t get out of your bed, and then you’re in trouble.”
Hobson began with the sit-to-stand exercise, and has progressed to squat with a 35kg barbell and deadlift 75kg.
Many people think motivation will just appear, says Hobson, but she says: “There’s no such thing as motivation really. It’s discipline. It’s building a habit. You’ve got to book your workouts in like a meeting at work, which is what I did when I retired. I prioritized fitness like a job.
“I also have my workout clothes ready to make sure I exercise—even if I’m planning to do it later in the day. I get dressed so I can’t talk myself out of it.”
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2. Walk a mile a day
If you’re totally new to exercise, or returning after a long break, Hobson says walking is an excellent place to start.
“We are a species that is supposed to move, and even a short 20-minute walk will support your heart, your ability to control your blood sugar levels, and help you mentally and physically,” she says.
Her trick is to listen to audiobooks while she walks to encourage her to go further.
“This is how I started before I ran my first marathon,” she says. “I walked a mile a day and I really forced myself to do it come rain or shine. After about five or six weeks I found that I wanted to go more.
“And one of the things that helped was listening to audiobooks. If I got home and I had got to an exciting bit in the book I would have to go back out again to hear the next chapter so it would make me walk a bit further.”
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Hobson describes herself as a run-walker, saying she has completed all her marathons that way. “I started exercising for something to do when I retired. Now I do it because it makes life easier.”
CrossFit means a lot of things to a lot of people – because it’s made up of a lot of things.
Since the rise of the fitness giant, countless brands, events and training methods have sprung up around it – not claiming to be CrossFit, but looking suspiciously CrossFit-esque.
There are, however, a handful of things that are uniquely CrossFit: the ‘Girls’ benchmark workouts. The Hero WODs and, of course, its signature rep schemes.
Chief among them is ’21-15-9′.
The 21-15-9 rep scheme may just be the single most CrossFit thing in existence. But what exactly is it? Where did it come from? And why might it actually be better at building muscle in a hurry than its conditioning roots would have you believe?
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Let’s have a look.
What Is 21-15-9?
If you’ve never encountered it before, the format couldn’t be simpler. Choose two exercises (occasionally more) and perform 21 reps of each, then 15 reps of each, then nine reps of each, completing the entire workout as quickly as possible – with good form.
Probably the best-known example is ‘Fran’: 21 thrusters and pull-ups, followed by 15 of each, then nine. On paper it doesn’t look especially intimidating. In practice, it’s one of the most feared benchmark workouts in fitness.
Where Did it Come From?
Unlike many modern training methods, 21-15-9 didn’t come out of a study. It came from the gym floor.
CrossFit founder Greg Glassman has explained that the format emerged through years of coaching and experimentation in the 1990s. Rather than chasing a perfect sets-and-reps prescription, he was looking for a workout that allowed athletes to maintain a high power output from start to finish.
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The thinking is surprisingly elegant. You begin with 21 reps while fresh. By the time you reach the set of 15, your ability to produce force has already fallen. By the final nine, you’re significantly more fatigued – but the workload has dropped by almost the same amount.
Instead of grinding through increasingly miserable sets of the same length, the workout ‘meets you where you are’, reducing the work required as your capacity declines. The result is a workout that encourages you to keep moving instead of standing around trying to recover.
The numbers themselves are also remarkably practical. Forty-five total reps per movement provides plenty of training volume without turning the session into an endurance slog, while every set divides neatly into thirds if you need to break it up.
(Although I’ve got to be honest, I’m a 20-15-10-5 man myself, just for the sake of round numbers.)
Why Does it Work So Well?
Although there isn’t research showing that 21-15-9 is somehow the magic formula, there are obvious reasons why it consistently produces brutally effective workouts.
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Descending reps help maintain intensity. As fatigue accumulates, reducing the target allows movement quality, bar speed and overall work rate to stay higher than they would if you simply repeated the same number of reps over and over.
It also tends to land in a physiological sweet spot. Most 21-15-9 workouts take between three and eight minutes, depending on the movements and the athlete. That’s long enough to create a serious cardiovascular challenge while still requiring meaningful force production throughout. You’re taxing your anaerobic systems hard while relying on your aerobic system to help you recover just enough to keep going.
Finally, there’s the psychological trick. The hardest-looking part comes first. Once you’ve survived the opening 21, every remaining round appears more manageable. ‘Only 15 left.’ Then, ‘Just nine.’ In reality, you’re becoming more fatigued with every rep, but the shrinking target keeps you attacking the workout instead of pacing too conservatively.
Why it Might be Surprisingly Good for Building Muscle
Perhaps the biggest misconception about 21-15-9 is that it’s ‘just cardio with weights’.
Choose the right load and something interesting happens. Very few athletes complete every round unbroken. Instead, the workout naturally evolves into a series of short, broken sets separated by only a few seconds of rest.
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Your 21 might become 11-5-5. Your 15 becomes 8-4-3. Your final nine might stay unbroken – or become 5-4.
In effect, you’ve accidentally turned the workout into a form of rest-pause training.
Those brief pauses allow just enough recovery to squeeze out more high-quality repetitions before fatigue catches up again. By the latter stages of each mini-set, you’re repeatedly working very close to failure, recruiting the high-threshold motor units with the greatest potential for muscle growth.
It’s a similar principle to rest-pause training, myo-reps and cluster sets: all methods used to accumulate hypertrophy-friendly volume while keeping the load relatively heavy and the rest periods brutally short.
You’re basically speed-running a large number of hard, growth-stimulating reps in a very small window of time. Could this help explain why elite CrossFit athletes often carry an impressive amount of muscle despite spending relatively little time performing traditional bodybuilding splits?
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It’s certainly plausible, although the ‘elite’ part often selects for athletes with the greatest muscle-building potential.
Much of their training isn’t simply conditioning. It’s high-density resistance training performed under accumulating fatigue, with only fleeting recovery between efforts. In other words, they’re often doing something bodybuilders have deliberately programmed for decades: packing a lot of hard work into a very short period of time.
That’s not to say 21-15-9 is superior to a well-designed hypertrophy programme. If your sole goal is building muscle, there are more efficient ways to do it.
But if you’re looking for a workout that develops fitness, tests your mettle and still provides a meaningful stimulus for strength and size, it’s easy to see why this deceptively simple rep scheme has remained one of CrossFit’s defining fingerprints for more than 20 years.
Best Bodyweight 21-15-9 Workout: ‘JT’
If you’re looking for an interesting twist on the 21-15-9 format, look no further than Hero WOD ‘JT’, which concentrates the muscle-building potential of the format into a brutal upper-body workout.
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Created in honour of Petty Officer 1st Class Jeff Taylor, who was killed in Afghanistan in 2006, the workout strips away barbells altogether and relies solely on three bodyweight movements:
21-15-9 reps of:
Don’t let the lack of equipment fool you. The volume – 45 reps of each movement, 135 reps in total – combined with the descending rep scheme makes this a brutal upper-body test, hammering the shoulders, chest and triceps while demanding serious muscular endurance.
Better still, it perfectly demonstrates one of the biggest strengths of 21-15-9. As fatigue mounts and the sets naturally fragment, the workout begins to resemble one giant rest-pause set, allowing you to accumulate a huge number of hard, near-failure reps in less than 10 minutes.
If your goal is building an impressive upper body while developing serious work capacity, there are few bodyweight workouts that deliver quite so much bang for your buck, making ‘JT’ one of my personal favourites.
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If there’s one thing Kori Sampson knows, it’s how to optimise your body composition for performance. To tap into his knowledge as an elite athlete and coach, we asked him to create a 4-week plan to help you move faster, recover quicker and keep pushing when the fatigue sets in – all while improving your muscle-to-fat ratio.
Ready to build muscle, burn fat and come out the other side looking, feeling and performing better? Click here to get 14 days of free access to the plan via the Men’s Health app.