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Arnold Schwarzenegger's ONE Exercise for Strength, Endurance, Muscle, and Fat Loss  – Fitness Volt

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Arnold Schwarzenegger's ONE Exercise for Strength, Endurance, Muscle, and Fat Loss  – Fitness Volt

Is there one exercise that can offer strength, endurance, muscle gain, and fat loss all at the same time? Arnold Schwarzenegger believes so. On September 6, 2024, in his Arnold’s Pump Club Newsletter, he lays out the overarching physical benefits of rucking or walking while carrying extra weight.  

The fitness space is absolutely obsessed with exercise selection, and for good reason. We have a limited amount of time and opportunities to fulfill our exercise needs, whether it’s at the gym, outside in the sun, or inside of our homes. 

However, with so many different muscle groups and targeted areas of concern, making genuine progress across the board can seem nearly impossible. This has led to a rapid increase in conversations about which exercises are best to build muscle.

We’ve seen countless takes on the hot subject. Nutritionist Stan Efferding, former seven-time Olympia Phil Heath, Chris Bumstead, and Nick Walker have all offered their top 10 exercises for muscle growth, but what if they could only pick one? 

Look no further as Arnold Schwarzenegger breaks down why rucking is the ultimate ‘Swiss Army Knife’ of exercise that can help you ‘achieve every fitness goal imaginable.’ 

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Arnold Schwarzenegger Explains Why Rucking Is ‘The Swiss Army Knife’ of ‘Muscle Gain and Fat Loss’

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According to recent research shared by Schwarzenegger, rucking may be the only exercise you need to improve strength, endurance, muscle gain, and fat loss.  

“The Only Exercise You Need?
If we told you that there was only one exercise you need to improve strength and endurance — while improving muscle gain and fat loss — would that be something you might be interested in? (Entourage fans, eat your heart out).”

“Research suggests that rucking — or walking while carrying extra weight — might be the Swiss army knife of exercise because of its ability to help you achieve every fitness goal imaginable.”

Of course, as a seven-time Mr. Olympia winner, Schwarzenegger utilized a range of exercises to build his larger-than-life physique and maintains that one movement alone is not likely to fulfill all of your needs. Though he enjoys various exercises, if he had to pick, rucking checks the most boxes. 

“Hype aside, we don’t believe there’s only one exercise anyone needs to do. The best type of exercise is the one that you’ll do consistently, and research shows that you’ll benefit from a mix of strength and cardio.

But if you had to pick one that checks all the boxes, rucking would do it better than anything else. It’s an activity you can do alone or with friends, and it gets you outdoors—which, as we’ve shared before, is good for your physical and mental health.”

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The scientific literature also suggests that rucking makes you stronger, builds endurance, and improves stamina without causing joint degradation. 

“Research suggests that rucking makes you stronger, builds endurance, improves stamina, and does so without much impact on your joints. If that wasn’t enough, studies have found that rucking helps you burn 100 more calories per hour than jogging at a moderate pace. And if you compare it to walking, researchers from South Carolina estimate that rucking can burn at least 2 to 3 times more calories than walking.”

In one study, Schwarzenegger revealed that wearing a heavily weighted pack led to participants losing three more pounds than those who wore lighter vests. He echoed that the ‘pounds seemingly disappeared’ even though they didn’t change other aspects of exercise or diet. 

“One study even found that wearing a heavily weighted pack resulted in participants losing three more pounds than those wearing a light vest. The cool part? The pounds seemingly disappeared despite not changing any other aspects of exercise or diet.

Scientists are investigating whether carrying the extra weight might trick your body into producing more leptin, a hormone in your fat cells. This could reduce hunger, increase your metabolism, and limit fat storage.”

Arnold Schwarzenegger isn’t the only proponent of rucking. Health expert and physician Dr. Peter Attia credited rucking as one of his top exercises (among a list of 10 movements) that can aid lifelong fitness and health. Additionally, Stanford professor and neuroscientist Dr. Andrew Huberman commits to one long ruck per week, which has long made up an integral part of his workout split for 30 years. 

I ruck to the gym three days a week and have found success with my endurance and strength over time. If you’re looking for a new way to challenge yourself and want to gain muscle and burn fat, give it a try! 

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RELATED: Rucking Basics for Fitness and Fat Loss


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I’m feeling my best ever at 80: these are my daily habits – and the one thing I never do

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I’m feeling my best ever at 80: these are my daily habits – and the one thing I never do

Having worked in wellness for over 50 years, what Sue Harmsworth doesn’t know about health and wellbeing isn’t worth knowing. The brand founder, who launched the beloved spa brand ESPA in 1992, has dedicated her whole life to the pursuit of wellness and looking at her now, at 80 years old, she’s clearly been doing something right.

Sue, who splits her time between Farnham, Surrey and Tenerife, has a strict daily routine that helps her stay on top form, and is quick to point out: “Stress, whichever name you put to it – mental stress, anxiety, illness – is at the core of societal problems today.

“We know now that prevention and lifestyle are the most important issues in keeping us healthy. In my view, integrative health and wellness is the way forward, and whether you call it spa, wellness, wellbeing, longevity, health span or something else, it always comes back to the core principles of good nutrition, exercise, good sleep, mindfulness and meditation.”

© Hester Barnes Photography & Film
Sue works hard on her health

That said, Sue isn’t immune to the perils of ageing, sharing: “My weakness is joints, so I have to look after my knees and shoulders. That aside, I do think that exercise is a massive part of the reason I feel so good at my age – if I don’t do something active every day, that’s when I feel an ache or pain.”

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Here, Sue shares her rigorous wellness routine – as well as the habits she actively avoids. Take notes!

1. Morning stretches

“I start every day with 15 minutes of stretching – bridges, cat cow, child pose, knee rolling, tabletop and so on.”

2.  Pool time

“My beloved pool routine includes 40 minutes in the pool – running, jumping, doing weights, squats and lunges, and riding on my aqua bike.”

older woman by her pool© Hester Barnes Photography & Film
Sue does a daily exercise routine in her pool

3.  Two personal training sessions per week

“Where possible, I do two PT sessions a week. I am also lucky to have a Technogym Kinesis (an all-in-one machine with built-in elastic bands, dumbbells, and more) in my gym at home, and I do rope exercises for my shoulders most days.”

Sue Harmsworth does her workout routine on her Kinesis machine© Hester Barnes Photography & Film
Sue Harmsworth does her workout routine on her Kinesis machine

4. Water therapy

“I tend to take cool showers and warm baths and use them as therapy. I rely on the shower in the morning for circulation and energy, while the bath (with Epsom salts and oils) helps my sleep process of winding down, because I have no tech in there.”

5. Contrast therapy

“I believe in contrast thermal therapy – always ending with cold. The practice has been around for centuries but is claimed as “new”. I sauna twice a week – hot, cold, hot, cold – always finishing with cold!”

woman wrapped in a towel in the sauna © Hester Barnes Photography & Film
Sue likes to sauna daily

6. Body brushing

“I have skin brushed for decade. It’s a form of exfoliation but also helps with circulation, always towards the heart.”

7. Microbiome care

“I have always been aware of the importance of the three microbiomes – oral microbiome, gut health and the microbiome and the skin microbiome. To support mine, I see a hygienist every four months, do swishing with coconut oil, use my electric toothbrush to clean my tongue as well as gums and teeth, and use a water pick as well.”

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8. One main meal – and no snacking

“In my eighties, I have to be careful with food. I try to only have one main meal a day, and I try to follow the Original Mayr Clinic principles of no raw after 4, no snacking at all, two fasting days, 16/8, and two vegetarian days.

woman smiling in white in her kitchen© Hester Barnes Photography & Film
Sue follows a strict diet – and doesn’t drink

“The quality of the ingredients and nutrient value is more important now and I avoid processed foods and try to cook from scratch and source high-quality produce.”

9. Minimal alcohol

“For the last three years have come off alcohol other than for really important celebrations and then one glass of a great pink Champagne is enough!”

10.  Avoiding surgery

“As we age, we want to avoid surgeries as it gets harder to recover, but it’s so important that stay mobile. One issue that has blighted my health is a series of problems with my joints, leading to a hip resurfacing procedure in my mid-50s, followed by joint replacement surgery in both shoulders five years ago which required a lengthy recovery period. 

“A few years ago, in my late seventies, I began experiencing pain and discomfort in my knees. I’ve followed a wide-ranging exercise regime my whole life and suddenly I wasn’t able to lift weights to support my muscle strength or do my daily exercises in the swimming pool.

woman in activewear at her home gym© Hester Barnes Photography & Film
Sue Harmsworth tries to do two personal training sessions per week

“I was struggling to even get up from a chair. It all happened very suddenly and as I was approaching 80, for the first time ever, I started to wonder how I was going to do everything. I felt really panicked. 

“I was lucky enough to be treated with a single and non-invasive hydrogel injection called Arthrosamid® with Dr George Bownes, Musculoskeletal, Sports and Exercise Medicine at Citius Health. A year on, I have absolutely no pain in my knees now. I’, able to enjoy all that life has to offer both professionally, pursing projects I’m passionate about including improving access to touch therapies for cancer patients and personally spending time with my children and grandchildren.”

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Bristol fitness expert offers free exercise for Parkinson’s

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Bristol fitness expert offers free exercise for Parkinson’s

Anne said she first noticed something was wrong with her when she started to get cramps in her hands and she started to have difficulty walking without feeling stiff.

“I was sent for a brain scan and, as a result of that, they diagnosed Parkinson’s disease,” she said.

She said exercising and meeting others in the same position had helped her.

“I find exercising with other people helps as you don’t feel quite as isolated, you meet people with the same condition,” she said.

“I wouldn’t have done what I do now, or met the people I met now, if it wasn’t for the diagnosis.”

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She said her son was “so enthusiastic” about everything he does.

“He certainly gets a lot of good remarks from people with Parkinson’s who feel they are dong something for themselves,” she said.

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Hybrid training: is this the secret to getting fitter and stronger?

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Hybrid training: is this the secret to getting fitter and stronger?

Tough Mudder. CrossFit. Hyrox. Some of this century’s biggest fitness trends have one thing in common: they require feats of both strength and endurance. People used to pick a side: either you used weights and resistance machines to build your muscles or you did cardio for the sake of your heart and lungs. Now everyone wants to be a “hybrid athlete”. So is this the best way to get fit – and where do you start if you’re a complete beginner?

What exactly is hybrid training?

Matt Lee, a postdoctoral research fellow at the Deakin Institute for Physical Activity and Nutrition in Australia, says: “Hybrid training – also known as concurrent training – combines cardio and resistance exercises (eg weights) within the same programme, performed either within a single session, or across separate sessions during the week.”

Where does it come from?

Hybrid training is not a new concept – official physical activity guidelines have long recommended a combination of strength and cardio exercises. But among athletes it was believed that endurance training had a negative impact on strength development (known as the “interference effect”); recent research has shown that is not the case.

Phil Price, a senior lecturer in strength and conditioning science at St Mary’s University, Twickenham, is the author of The Science of Hybrid Training. He says the term itself was coined by Alex Viada in his influential 2015 book, The Hybrid Athlete (which was updated last year). “He was a powerlifter and then he started running, so he was actively chasing two goals that don’t necessarily support one another,” Price says. “Hybrid came to mean a very clear focus on two separate goals that come from two separate sports.”

The hybrid concept has evolved, making it appeal to anyone who wants to get fitter and stronger. “It has been used for anything that requires an endurance component and a strength component,” says Price. “The rise of CrossFit really developed it and it’s definitely been utilised by those who do Hyrox.” CrossFit is a high-intensity workout combining cardio with elements of weightlifting and gymnastics; Hyrox is a fitness competition mixing running with burpees, kettlebell carries, sled pushes and more.

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Thomas Jones, an associate professor of sport, exercise and rehabilitation at Northumbria University, says: “Hyrox, which is super-popular at the moment, is almost the definition of hybrid. Those events are aerobic-based, so there’s a running element, and then there’s also a strength element and a power element.” Organisers say more than 1 million people entered a Hyrox race during the 2025/26 season, which culminates with the world championships in Stockholm this month.

Hyrox is almost the definition of hybrid training, with a running element, as well as power and strength elements. Photograph: HYROX

A hybrid scene has also developed through social media, says Price. “More and more people have created these hybrid goals of, for example, doing a 500lb [227kg] squat and on the same day running a sub-five-minute mile. People are online competing with each other and through that, the culture has really boomed.”

What are the benefits?

Lee says hybrid training has numerous benefits for overall health and wellbeing, as well as sports performance. “Research has shown hybrid training can improve strength, muscle mass, power, endurance, speed and agility,” he says. “Beyond physical gains, studies of people who do hybrid training such as CrossFit report perceived improvements in quality of life, reduced stress, increased self-esteem and social benefits.” A previous study found this sense of belonging was significantly higher at CrossFit gyms than at traditional ones.

And hybrid training is a boon for busy schedules. “For many people, lack of time is a major barrier to exercise,” says Lee. “Combining cardio and resistance exercises within a single session is a time-efficient way to meet training goals.” I can relate to that – the “warrior” class at my local gym combines treadmill or rowing intervals with free-weight sets, for a full-body workout in just 45 minutes.

Hybrid training is perfect for those who are time poor. Photograph: Posed by models; Pekic/Getty Images

Alexios Batrakoulis, an assistant professor of applied and clinical exercise physiology at European University Cyprus, has conducted extensive research into hybrid training. He has seen great results from participants completing a 30-minute circuit-style hybrid programme up to three times a week. After 10 to 12 months, he reports: “Previously inactive middle-aged adults with overweight/obesity have significant body mass and fat reduction, as well as improvements in performance, cardiometabolic and psychological health.” He found that people enjoyed these “moderate to vigorous” circuits more than “traditional moderate-intensity continuous training”.

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Is it suitable for beginners?

Absolutely – with the caveat that you check with your GP if you have any existing injuries or health conditions (and pay no attention to social media challenges). Kim Way, a senior lecturer at the Deakin Institute and an exercise physiologist with Exercise and Sports Science Australia, says beginners should do a combination of aerobic and resistance training two or three times a week.

“Start with low- to moderate-intensity exercise to help the body get used to the different exercises and get used to a routine. Use intervals to help break up aerobic activity to get used to moderate intensity with some recovery as well,” she says. “The talk test is a great way to gauge if you are going too hard with aerobic exercise. Moderate-intensity does make you a bit breathless, but you’d still be able to maintain a conversation with someone or be able to sing.” Build a foundation with four to six weeks of consistent training before adding another day or a high-intensity session, she adds.

What sort of aerobic exercise should I do?

This depends on your goals, says Lee. If you want to build up to a Hyrox event, running is essential – each race includes eight 1km runs – as is training on skiing and rowing machines. If you just want to get fitter, running is one option, but you may enjoy others more. “Substituting other cardio options such as swimming or cycling can still improve cardiovascular fitness while reducing the risk of overuse injuries that may occur from high volumes of running,” says Lee.

And what sort of strength training?

Again, if you’re training with Hyrox in mind, it make sense to focus on the strength-based events in the races: sled push and pull, farmer’s carry, sandbag lunges, wall balls … If you’re new to these exercises, says Way, scale back the weights, reps and sets. But if you just want to improve your general strength, she recommends “whole-body, compound movements such as squats, deadlifts and bench presses, which will provide immense benefit”.

Body-weight exercises, such as press ups, are a good alternative to using weights. Photograph: Posed by model; Organic Media/Getty Images

“Two of the biggest predictors of quality of life in old age are strength (one-rep max) and aerobic fitness (VO2 max),” says Jones. “Strength is what often gets neglected by those who are new to exercise – they just run.”

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Does the order I do them in matter?

“Research, including my own, suggests the order of cardio and resistance exercise has little influence on improving cardio fitness,” says Lee. “However, if a person’s goal is to improve strength, some research suggests completing resistance exercise before cardio might lead to greater strength gains, and that greater recovery time between modes (more than three hours) may benefit explosive strength development (power) – but more research is needed on these.”

Do I need to join a gym?

“For people with limited exercise experience, gyms can be a great place to start, as they provide access to professionals who can help develop suitable training plans and guidance on techniques,” says Lee. If you want to get into CrossFit, for example, there are about 10,000 gyms in 150 countries.

You can do your own hybrid training on the gym floor, using the cardio and resistance machines and/or free weights, but another option is joining a hybrid-style class. “Group classes can provide a sense of community and social support, which may also help with motivation and consistency,” says Lee. Some gyms offer dedicated Hyrox classes; others to look out for include bootcamp, circuits, functional fitness, and strength and conditioning. “When joining a group class, always remember to listen to your body,” says Way. “It is OK to stop and have a break if your body is not used to what is happening.”

Going to the gym doesn’t necessarily mean committing to a year-long membership. Apps such as ClassPass enable you to buy credits to use at a variety of gyms, and there are no-contract, pay-monthly budget chains such as PureGym and the Gym Group (which also offer classes). Community centres often have low-cost hybrid-style workouts – my local one has an hour’s circuit training for £8 – and many parks have free sessions, such as the beginners’ bootcamps and other classes run by Our Parks across the UK.

Can’t I do hybrid training at home?

Absolutely – you can combine cardio with home strength training. For example, you could follow the NHS’s Couch to 5K running programme alongside Our Parks’ Couch to Fitness programme. Jones says: “Remember what Joe Wicks was doing during Covid? That would be hybrid training.” Wicks is still posting free videos on YouTube – a recent 20-minute “strength, cardio and abs” workout fits the hybrid bill.

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You don’t need any specialist equipment, at least initially. “For people just getting started, body weight exercises are enough,” says Jones. “If you can’t do 10 good push-ups, that’s a really good place to start.” Way suggests squats, lunges and pull-ups alongside your push-ups. When you’re ready to move on, “Filling up a backpack with cans or water bottles can add load,” she says.

Batrakoulis says you don’t need to invest in heavy weights to progress further, but some “functional training tools” can be useful: resistance bands, kettlebells, exercise balls and medicine balls; even suspension straps and battle ropes, if you have space.

Outdoors gyms make it easy to combine cardio and strength training … and they’re free! Photograph: Posed by model; coldsnowstorm/Getty Images

Jones is also a fan of outdoor gyms in parks: “They’re great because it gives you the opportunity to run and then jump in and do some pull-ups and body-weight exercises.”

How much training should I do?

Lee says: “For overall health, the World Health Organization recommends adults aged 18 to 64 engage in at least 150-300 minutes a week of moderate-intensity aerobic physical activity, or 75-150 minutes a week of vigorous-intensity aerobic physical activity (or an equivalent combination of the two), plus muscle-strengthening activities at moderate or greater intensity on two days a week.” But don’t try to go from zero to hero, says Way: “If you are not currently meeting these guidelines, a slow and gradual buildup in activity is recommended.”

This is especially important in hybrid training, says Price, because of the various demands it puts on the body. “The endurance exercise is going to fatigue things in different ways to the resistance exercise. The high-intensity stuff is going to fatigue your body in different ways to the long-duration, low-intensity stuff. All of a sudden you’ve got a mix of everything.” His advice is to “start off slowly and progress very slowly because you don’t know how well your body will respond to the different stimuli and how close they are together”. The good news? “The body is really adaptable and will start to deal with that type of mixed stress quite well.”

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Should I do cardio and strength training in the same session?

If you’re doing hybrid classes, clearly yes. Otherwise, says Jones, it’s down to preference and time. “I cycle some days and I lift weights other days. But some people wouldn’t like that approach. My wife, for instance, loves getting out in the garden and doing a circuit. So whatever works for you will be effective.”

Should I train every day?

No – rest days are essential. “It’s important to allow enough recovery time between sessions, not only for adaptations to occur, but to also minimise the risks of overuse injuries and overtraining,” says Lee. Way says beginners need at least 24-48 hours of recovery between sessions to help the body adjust.

Prioritise sleep. “Sleep for all exercise is really quite important. I think people underestimate that,” says Price. “I see it like a triad. Quite often if people are struggling with their training or they have a niggling recurring injury, they think there must be something that they’re doing wrong in training. But they need to go and make sure that they’re getting enough water, their nutrition’s right and they’re getting enough sleep. Quite a lot of the time, it’s their everyday life that isn’t providing that support to recover for them.”

Do I need to change my diet?

Keep energy levels topped up with a good combination of protein and carbs, as well as lots of water. Photograph: filadendron/Getty Images

“As long as you’re getting good protein and carbs between sessions and lots of water, you should be good to go,” says Price. Specifically, he says, you need sufficient amounts of the amino acid leucine, which is found in most protein sources (meat, fish, cheese, beans, nuts, seeds, tofu etc). “Whenever the body tries to respond to the training stress from a strength point of view, the intake of protein is one of the signals to spark protein synthesis, which then improves muscle hypertrophy [growth]. So you’re trying to avoid that molecular process getting disrupted.”

Protein is often prioritised these days, but don’t overlook carbohydrates. “Carbohydrates broken down can get stored into muscle glycogen [fuel], and both strength and endurance training can reduce those stores. So if you’ve trained, you want to make sure that anything that was used from the previous session has been replenished,” says Price.

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And finally … where do I sign up for the Hyrox world championships?

Sadly, that is invite-only for the top 0.5% of athletes. How about a Hyrox cruise instead?

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