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What Is REHIT? This 10-Minute Workout Has Major Heart Health Benefits

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What Is REHIT? This 10-Minute Workout Has Major Heart Health Benefits

You can always rely on a high-intensity workout to leave you feeling sweaty and exhausted. But a longer workout isn’t necessarily better. And a new approach that’s gaining fans on social media only requires a few minutes of your time to get major health benefits.

The workout, reduced-exertion high-intensity training (REHIT) workout, is still intense, but it’s shorter than a typical high-intensity interval training (HIIT) workout, explains Stephanie Mansour, certified personal trainer and TODAY fitness contributor, tells TODAY.com.

While a regular HIIT workout can of course be short too, “these REHIT workouts have to be short,” she says, “So they’re like, 10 to 15 minutes max.” Not only is the total workout time shorter, but so are the intervals of work that you’re doing, Mansour says.

Is it really possible to get a good workout in such a short amount of time? Experts and research suggest that, actually, yes, a short workout like this — when done in a specific way — can be extremely beneficial.

And it’s likely to be especially helpful for certain groups of people.

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What Is a REHIT Workout?

Interest in HIIT started to grow about a decade ago because people saw it as a way to get “more bang for your buck in terms of a shorter time commitments and greater gains,” Lance C. Dalleck, Ph.D., professor of exercise and sport science at Western Colorado University and member of the American Council on Exercise Scientific Advisory Panel, tells TODAY.com.

And HIIT is generally more efficient at burning calories than continuous or steady state workouts. But, he explains, even with the shorter time commitment, people tend to find HIIT really hard and taxing. That’s where REHIT — reduced-exertion high-intensity training — comes in.

It’s a type of high-intensity interval training, a format of exercise that relies on periods of work alternated with periods of rest. In a normal HIIT workout, it’s common to exercise for 45 minutes with escalating intervals of work, Mansour explains.

But with REHIT, both the total workout time and the intervals of intense training within the workout are shorter than in a normal HIIT session, says Dalleck, who has published multiple studies investigating the potential benefits of REHIT.

“It’s not like you’re building up your speed or building up your strength,” Mansour says. “It’s an all-out sprint for the 20 seconds of that interval.” On the flip side, your rest periods are longer than you’d get in your usual HIIT class, typically around 3 full minutes.

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Even though you’re working at your maximum of exertion during those short bursts, the overall shorter duration and extended rest time make it feel more doable, Dalleck explains.

In a HIIT class, you might only be given 30 seconds or a minute of rest before your next interval starts, he says, and “your heart rate and your breathing is still elevated.” Allowing yourself to more fully recover in REHIT both makes the workout feel less subjectively taxing and “allows for that subsequent maximal effort to be what it should be, which is pretty hard,” Dalleck explains.

The REHIT protocols used in research, performed on a specific type of stationary bike that utilizes AI, typically follow something along the lines of this format:

  • Warm up for 2 minutes.
  • Sprint for 20 seconds.
  • Rest for 3 minutes.
  • Sprint for 20 seconds.
  • Cool down for 3 minutes.

The total workout time is just 8 minutes and 40 seconds, and is performed three times a week.

But, as with traditional HIIT, the REHIT format is versatile enough to be applied to just about any type of workout you enjoy doing — as long as you can safely perform it at a high level of intensity.

The Science Behind REHIT

While REHIT might sound like a gimmick, there is some solid scientific evidence to back up the way it works, Dalleck says.

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“What it boils down to is our mitochondria, where we are regenerating or creating our energy currency, which we call ATP,” he explains. Turning on the bodily systems that increase the activity of mitochondria is based on our use of muscle glycogen, our main carbohydrate.

All it takes to use up enough of that muscle glycogen to flip the switch is a few 20-second intervals of maximum effort activity. “That signals our body … we’re using a lot of energy really quick, and we have a need to make more energy really quick, so we need to make more mitochondria,” Dalleck explains.

Essentially, your body adapts. And this is one of the processes that contributes to the cardiorespiratory benefits of exercise, and it promotes heart health and even longevity.

REHIT is really an attempt to find the minimum dose of interval training to get you this type of mitochondrial response, Dalleck says. So, doing additional sprints doesn’t have any additional benefit because you’ve already hit the threshold to activate this system.

REHIT Workout Benefits

The most obvious benefit of REHIT is the short time. These workouts are intentionally short, meaning you can squeeze them in before or after work or while traveling.

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“You can get that workout in, pretty quickly get some fitness gains or even maintain fitness,” Dalleck says. Maybe you can’t do your normal runs over the holidays, for instance, but a REHIT session here and there can help ensure you don’t lose fitness progress.

REHIT is also ideal for people who are experiencing a weight-loss plateau, Mansour says. If you do a lot of high-intensity workouts without much rest, you’re likely taxing your body more than you need to in order to get the benefits of exercise, she explains.

That, along with other kinds of mental and physical stress, can cause your levels of cortisol to rise, a hormone that may actually impede weight-loss efforts.

If that’s the case for you, Mansour says, “lowering the amount of time that your body’s under stress (during the workout) and also lowering the amount of time of the workout in general can be really helpful.”

Those intervals of maximum effort will still cause a cortisol spike, she explains, “but it’s for a shorter amount of time, and then you have a longer recovery after. So the cortisol spike isn’t as high for as long of a time as with a traditional HIIT workout.”

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REHIT workouts have also been shown to lower risk factors for type 2 diabetes and improve glucose metabolism, Dalleck says. Other research has shown improvements in insulin sensitivity following REHIT sessions.

You can also think of REHIT like a mental reset, Mansour says, or a way of retraining yourself and your body to get reacquainted with a healthy balance of work and rest intervals again.

And if you’ve been exercising intensely in one way for a long time, this can help you shake up your routine while still doing the type of fitness that you enjoy.

How to Start

You don’t need a fancy, AI-powered bike to get the benefits of REHIT. “Whatever you’re doing that you already like, you could apply this to your workout,” Mansour says.

And, Dalleck adds, his research team has found that many types of functional at-home workouts can provide benefits when performed with a REHIT format, including medicine ball drills and bodyweight exercises.

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Whether you’re a fan of Pilates, strength training, running, cycling or walking, there’s a way to use REHIT “to make it a little bit more exciting or different, or change what your body expects,” Mansour says. For instance, see how many crunches or jump squats you can do during those sprint intervals, she says.

However, because REHIT involves max effort pushes and working at fast speeds, it’s important not to sacrifice your form in an effort to get more reps, Mansour cautions. If you know you’re going to be doing an exercise quickly with all-out effort, she recommends doing a few reps slowly in front of a mirror first to make sure your form is solid.

Dalleck emphasizes that people should not drop all of their favorite workouts in favor of doing REHIT for the rest of their lives. Instead, REHIT should be individualized to your preferences and experience level.

For example, rotate in a few REHIT workouts when the weather’s nice enough to be outside, when your spin classes have gotten stale, when you’re short on time or when you’re feeling stressed out. Think of it as “another tool in your kit of different options,” he says.

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At 72, Oprah swears by this specific move for full-body strength – here’s why it’s so effective

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At 72, Oprah swears by this specific move for full-body strength – here’s why it’s so effective

Oprah Winfrey, 72, has been vocal about her weight loss journey in recent years, revealing that maintaining fitness, particularly through strength training, has been crucial while using GLP-1s. Such is her love for these newfound fitness habits that she even did a 72-minute workout to celebrate her 72nd birthday earlier this year.

Now, the talk show host has taken to Instagram to share with her followers a specific strength move that has quickly become a staple in her routine: kettlebell swings.

Why are kettlebell swings effective?

‘Kettlebell swings are one of the most efficient movements because they combine strength, power and cardiovascular conditioning in one exercise,’ says Alice Jordan, a women’s strength and hormone health coach. ‘They target the posterior chain – glutes, hamstrings and lower back – which is especially important for women as we age, helping to improve posture, reduce back pain and support metabolism.’

Jordan adds that kettlebell swings ‘also elevate the heart rate quickly, making them ideal for busy women who want maximum results in minimal time,’ and that when incorporated into your routine correctly, they ‘can improve fat loss, core stability and overall functional strength, which carries over into everyday movement and injury prevention.’

Another key benefit that makes kettlebell swings such an effective movement for women as they age? ‘They help build explosive strength and bone density – both crucial for women during and after menopause.’

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How to do kettlebell swings

It’s important to take the time to properly learn the right technique – as Oprah said she did. Alongside the video she posted on Instagram of her performing the exercise, Oprah wrote ‘I first saw other people doing kettlebell swings so skillfully that I didn’t attempt them for at least a year! Now Trainer Peter is always right by my side to course correct me so I’m doing them right – and I think I finally got the swing of them.’

Explaining how to do kettlebell swings, Jordan says that ‘the movement should come from the hips, not the lower back or shoulders. Think about pushing your hips back, keeping your spine neutral, and then powerfully driving the hips forward. This helps target the glutes and reduces the risk of injury.’

When it comes to ensuring that you choose the right weight, Jordan adds that a ‘good starting point for most women is a kettlebell between 6-10kg – but the key is that it should feel challenging enough to drive the hips forward without using the arms.’

‘If you can easily lift it with your shoulders, it’s usually too light. Many beginners actually benefit from going slightly heavier so they learn proper hip hinge mechanics,’ she flags.

How often to do kettlebell swings

So, how often should you do the move per week? ‘For beginners, I’d typically recommend starting with 2-3 sets of 10-15 reps, focusing on good technique and plenty of rest between sets,’ says Jordan. ‘The priority early on is learning the hip hinge and building confidence with the movement, rather than pushing volume too quickly.’

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Doing this 2-3 times per week works well for most beginners, she adds, as it ‘allows enough time to recover while still building strength, power and cardiovascular fitness.’ When your technique and fitness improve, you ‘can gradually increase either the number of sets or include swings as part of full-body workouts.’

‘It’s also helpful for beginners to keep sessions relatively short and stop before fatigue affects form, as this reduces the risk of injury and helps reinforce good movement patterns.’

Common mistakes to avoid

Jordan says common mistakes to avoid include:

  • Turning the swing into a squat rather than a hinge
  • Lifting the kettlebell with the arms instead of letting momentum and hip power do the work
  • Rounding the back and going too heavy too quickly

It really is important to be patient and take some time to get your form exactly right – as it will mean you’ll get the most out of the exercise in the long run.


Headshot of Hannah Bradfield

Hannah Bradfield is a Senior Health and Fitness Writer for Women’s Health UK. An NCTJ-accredited journalist, Hannah graduated from Loughborough University with a BA in English and Sport Science and an MA in Media and Cultural Analysis.  She has been covering sports, health and fitness for the last five years and has created content for outlets including BBC Sport, BBC Sounds, Runner’s World and Stylist. She especially enjoys interviewing those working within the community to improve access to sport, exercise and wellness. Hannah is a 2024 John Schofield Trust Fellow and was also named a 2022 Rising Star in Journalism by The Printing Charity.  A keen runner, Hannah was firmly a sprinter growing up (also dabbling in long jump) but has since transitioned to longer-distance running. While 10K is her favoured race distance, she loves running or volunteering at parkrun every Saturday, followed, of course, by pastries. She’s always looking for fun new runs and races to do and brunch spots to try.

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The Workout Habit That Can Become Harm

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The Workout Habit That Can Become Harm

If your day begins with a HIIT class and ends with the saintly glow of “I’ve been good,” you’re not alone. Regular movement can lighten stress, settle anxiety, and generally make the world feel a little less like a group chat on deadline. But for a small group of gym-goers, exercise addiction isn’t a punchline or a humblebrag — it’s a real behavioural pattern that can quietly bulldoze daily life.

Researchers in Budapest have suggested that for around 0.3 to 0.5% of gym-goers, working out and the quest for ultimate wellness can tip into unhealthy obsession. And a separate study from Anglia Ruskin University found the risk rises sharply for people with a history of eating disorders — with researchers reporting you’re nearly four times more likely to experience exercise addiction if you’ve previously had anorexia or bulimia.

It’s an uncomfortable twist, because exercise is supposed to be the good bit. The socially approved coping mechanism. The one that gets likes, not concerned phone calls.

Why “Healthy” Can Be a Convenient Disguise

Wellness culture has a curious magic trick: it can make rigid rules look like discipline. Eight hours’ sleep becomes a badge of honour. “Clean eating” becomes a personality. And a workout missed can feel, for some, less like a rest day and more like a moral failure.

That’s what makes compulsive exercise hard to spot — especially during or after recovery from disordered eating. To friends and family, it can look like someone has “sorted themselves out.” Under the surface, the engine can be the same: fear, control, anxiety — just with different gym kit.

As Eating Disorders Awareness Week begins (March 2–8), we spoke to experts about wellness, disordered exercise, and the additional risks for those with a history of eating disorders.

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Can Eating Disorders Be Replaced by Exercise Addiction?

Kerrie Jones, a psychotherapist specialising in eating disorders and clinical director of treatment centre Orri, says eating disorders and exercise addiction often share the same roots — and the same function.

“Eating disorders, like exercise addiction, arise when we have lived through an experience – or lots of different experiences – that have taught us that we’re not safe in our day-to-day lives,” she says.

“Obsessing about food, weight or exercise is a behavioural mechanism that has developed as a means of keeping us feeling safe and in control when otherwise we’d feel overwhelmed with fear and anxiety.”

Jones explains that these behaviours can narrow a person’s focus to what feels measurable and manageable — calories, reps, weight, shape — while masking the deeper fear underneath.

“We call these ‘maladaptive’ coping mechanisms, as they develop through seemingly good intentions, but to the detriment of our longer-term physical and mental health.

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“Sometimes, when people reach a point in their recovery where they are stable and functioning, they may move from an obsessive relationship to food, to an obsessive relationship to exercise.”

And because exercise is widely applauded — and often actively encouraged — the behaviour can stick around far longer than people realise.

“It’s a much more socially accepted and idolised means of maintaining obsessive behavioural patterns,” says Jones, which means it can linger for years before someone seeks help.

What Drives Exercise Addiction Psychologically?

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There’s rarely one neat cause. It’s more often an overlap of biology, social pressure, past experiences, and psychology — with a particular role for trauma and learned patterns of control.

“There’s no one reason or cause why someone might develop an eating disorder or exercise addiction, however, it’s often a combination of social, genetic and psychological factors,” says Jones. “Commonly, we find a negative life experience or traumatic experience at the root.”

Chartered psychologist and Healthspan ambassador Dr Meg Aroll says more research is needed specifically on exercise addiction, but we already know a lot about how behavioural addictions operate — particularly the loop of compulsive thoughts and repeated behaviours.

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“We know that it’s important to change patterns of ruminative and compulsive thoughts in people with behavioural addictions, which is why treatments such as cognitive behavioural therapy are likely to be of help.”

In plain terms: it’s not about willpower. It’s about patterns — and treating what’s driving them.

Signs to Watch For: When Training Turns Compulsive

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There’s no single template for exercise addiction. People don’t present in one uniform way, and “looking fit” tells you precisely nothing about what’s happening mentally.

But there are common warning signs, especially when exercise becomes less about wellbeing and more about relief, guilt, or control.

Jones says a person might:

  • Feel guilt and shame about missing exercise routines
  • Keep secrecy around how much they’re exercising
  • Continue to workout when ill, exhausted or injured
  • Prioritise exercise repeatedly over family, friends, work, and recovery

That last point matters. Training that regularly trumps relationships, rest, or basic health isn’t “dedication.” It’s a red flag waving in fluorescent gym lighting.

Does Social Media Make It Worse?

Social media can be supportive — community can be a lifeline — but it can also validate compulsive habits. A life organised entirely around workouts can look, online, like “motivation,” when the reality might be anxiety management dressed up as routine.

“For people who are predisposed to eating disorders or behavioural addictions, wellness culture can appear to support and condone this type of maladaptive behaviour,” says Aroll.

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“However, on its own, wellness and social media culture is not to blame – someone with such conditions will have a complex combination of factors in their life leading to their symptoms, which should be investigated fully and treated professionally.”

Jones adds that if you know you have an addictive personality, it’s worth curating your feed with intent — and unfollowing content that escalates guilt, restriction, body obsession, or punishment narratives.

What To Do If You’re Worried About Someone

The hardest part is saying something — and the most important part is saying it well. Jones recommends addressing it directly, but with care around timing, tone, and what you focus on.

“It’s important to broach the topic with them directly as their physical and mental health may be severely at risk,” says Jones. “Pick a time to talk when emotions aren’t running high, and where possible, try and avoid talking about exercise specifically or the more symptomatic aspects of exercise addiction or their eating disorder.

“Instead, focus your questions and concerns on how they’re feeling, underneath their day-to-day activities.

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“Keep in mind that there are specialists out there who can help and the charity Beat has numerous resources on how to have a difficult conversation with someone.”

In other words: aim beneath the behaviour, toward the emotion.

Do We Need a Broader Conversation About “Healthy”?

Here’s the tricky bit. Health professionals rightly champion exercise for physical and mental health. But for people recovering from eating disorders — or with a vulnerability to compulsive behaviours — messaging can land differently. “More is better” can become a permission slip for harm.

“I think there needs to be a broader conversation about what it means to be ‘healthy’ and to live a ‘healthy lifestyle’,” says Jones. “What works for some, may not work for others, particularly if they’ve suffered with an eating disorder in the past and would have trouble maintaining a normal relationship to exercise and food.”

Jones says clinicians assessing physical health need to consider personal history and the intention behind the behaviour.

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“If possible, we need to investigate the intention associated with exercise and unpick the feelings that arise before, during and after exercising.”

That’s the real measuring stick. Not calories burned, not streaks kept alive, not the smug serenity of a kale smoothie. If movement helps you live more freely, it’s doing its job. If it’s tightening the cage — especially in recovery — it’s time to call it what it may be: exercise addiction, and something that deserves proper support, not applause.

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I’ve seen some bizarre exercises online. If I were an influencer, this is the one workout I’d recommend | Devi Sridhar

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I’ve seen some bizarre exercises online. If I were an influencer, this is the one workout I’d recommend | Devi Sridhar

Are you still keeping up with your 2026 resolution to exercise more? Or perhaps you’re just trying to survive the winter doldrums, with exercise the last thing on your mind. Whatever it is, social media is alight with fitness influencers showing off all kinds of bizarre and viral exercise trends.

Take squats, a core exercise move. Those don’t seem good enough any more, so now we have Zercher squats (holding a barbell in your elbow crease like a metal baby), squats on vibration plates, squats while throwing a heavy ball and on and on. Some of these exercises may in fact be good, some useless, but because influencers can’t be seen to be doing the same thing every day, the key thing is that they’re novel and can be sold as “the little-known secret exercise that everyone should be doing”.

Then there’s adding a gimmick to an existing exercise. There’s goat yoga, puppy yoga and – my favourite new trend from the US – snake yoga, in which snakes such as pythons slither around the room and on to mats and yogis while they’re in downward dog thinking about spiritual intentions or, more likely, what’s for dinner. The marketing is that being around snakes in yoga can help overcome a fear of snakes while also building flexibility. Cross two things off your to-do list at once!

Here’s my public health take: fear of snakes is rational. About 5.4 million people are bitten by snakes each year. Evolution spent thousands of years instilling that fear in us – for good reason.

Why do bizarre fitness trends go viral, and why do they appeal to something within us? I think it has to do with boredom, the need for novelty and Fomo. Exercise can feel boring: going out running for the same 5k or heading to the gym to the same equipment and space. This is true also for yoga, which can feel slow and lack excitement.

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The idea of trying something new is appealing, plus there is a constant push by certain fitness influencers implying that they know something we don’t. Some of them play on health anxiety and a desire to optimise with the “best” exercise to maximise your time and results: how to get a six-pack in two weeks or how to lose 10kg in five days (both pretty much impossible, by the way). Plus they’re telling us to buy a supplement or try a new juice cleanse that will be the missing piece to make us feel better by March.

Fitness trends sell that hope of feeling better. Take Hyrox, a hybrid endurance event where super-fit people pay good money to push sleds, throw wall balls, burpee-jump across the room and run between various stations. It’s impressive to watch and looks great on social media – which feels essential these days – and it’s a clear way to show your friends how fit you are. But it also reflects the push towards extreme, complicated and injury-prone exercise.

I’m going to say something you don’t want to hear, especially if you love Hyrox or snake yoga: none of this is necessary. If your goal is to feel strong, move better, stay pain free and live longer, you need three things: cardio exercises, resistance training and mobility training.

You don’t need weights, reptiles or cameras. It sounds simple, but what makes exercise hard isn’t the actual movement. It’s finding the time and routine to make it sustainable and part of your daily life. Which brings me to the most untrendy thing I can offer you: a 13-minute workout you can do anywhere, with or without weights. This is my default on busy days, and when I’m at home I have an 8kg sandbag on hand to add in.

All you need is a timer on your watch or phone. Start with three minutes of cardio to get warm and your heart rate up, whether it’s jogging on the spot, jumping jacks or just marching. Then it’s three minutes of legs, rotating between five each of narrow squats, broad squats, backward lunges, forward lunges and calf raises. Then on to three minutes of upper body, moving between five each of narrow push-ups, wide push-ups and tricep dips. Time to move on to core with a one-minute plank (either on your hands or forearms) and one minute of glute bridges (lifting your hips off the floor while lying on your back). For the final two minutes, just stretch out, whether that’s standing and reaching for your toes, lying on your back and moving your legs right and left like windshield wipers or sitting cross-legged and folding forward.

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That’s it. Do this a couple of times a week if you can. Will you see it go viral on socials? No. Will it get sponsored by a supplement company? No. Will it increase your healthy life expectancy and make you feel happier? Public health evidence suggests yes. The real challenge, it turns out, isn’t finding the latest hack or trend. It’s sticking with a (snake-free) routine, even when the novelty wears off and 2026 resolutions fade from memory.

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