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How much should you exercise to actually lose weight?

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How much should you exercise to actually lose weight?

Two and a half hours of physical exercise per week may be essential for achieving any significant reduction in body weight, a new review of studies has found.

The review, published in the journal JAMA Network Open on Thursday, analysed previously conducted clinical trials probing the effect of exercise on weight loss.

It found that doing about 30 minutes of exercise a week was linked to only a modest reduction in body weight, body fat measures, and waist circumference among adults with obesity.

However, aerobic exercise exceeding 150 minutes per week, at moderate intensity or greater, was more likely to achieve clinically important reductions in weight-loss parameters.

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Adult with obesity practicing running
Adult with obesity practicing running (University Of Granada)

Aerobic exercise is any type of physical activity that raises a person’s heart rate and gets them moving and sweating for a sustained period of time.

Previous studies have shown this type of cardio exercise provides a range of benefits when coupled with a healthy diet, enabling people to think more clearly, and even protect against cognitive decline with age.

Some previous studies have estimated the optimal minimum period of exercise at between 30 and 45 minutes.

As little as 30 minutes of aerobic exercise has been linked to significantly better performance on cognitive quizzes.

One study showed that about 30 minutes of treadmill walking for 10 consecutive days may significantly reduce depression.

But the exact amount of optimal exercise needed for weight loss has been unclear.

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Health guidelines suggest that at least 150 minutes a week of aerobic exercise at moderate intensity is key to achieving meaningful weight loss of about 2 to 3kg. Some studies suggest a moderate intensity physical activity of about 225 to 420 minutes per week is required for weight loss of 5 to 7.5 kg.

Being overweight surpasses smoking as Australia’s leading health risk

The new study assessed data from over 100 clinical trials examining the effect of exercise over a duration of at least eight weeks on overweight or obese adults.

Researchers found that 30 minutes of aerobic exercise per week may enable adults who are overweight or have obesity to “slightly reduce” body weight.

However, they found the “greatest, clinically important” improvement from aerobic exercise of over 150 minutes per week.

“Aerobic training at least 150 minutes per week may be needed to achieve important reductions in waist circumference and body fat,” they said in the review.

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“Longer durations of aerobic exercise may be associated with more beneficial weight or waist circumference outcomes.”

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Fitness

Put the fun back in your fitness routine with this 10-minute follow-along workout from The Curvy Girl Trainer Lacee Green

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Put the fun back in your fitness routine with this 10-minute follow-along workout from The Curvy Girl Trainer Lacee Green

Ever feel like beginner-friendly workouts are anything but?

That’s how BODi Super Trainer Lacee Green felt, so she devised a three-week, entry-level program designed for genuine newcomers to exercise—or those just getting back into it.

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Higher fitness levels linked to lower risk of depression, dementia – Harvard Health

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Higher fitness levels linked to lower risk of depression, dementia – Harvard Health
research review

People with high cardiorespiratory fitness were 36% less likely to experience depression and 39% less likely to develop dementia than those with low cardiorespiratory fitness. Even small improvements in fitness were linked to a lower risk. Experts believe that exercise’s ability to boost blood flow to the brain, reduce bodywide inflammation, and improve stress regulation may explain the connection.

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Fitness

These 20-Minute Burpee Workouts Replaced His Entire Gym Routine – and Transformed His Physique

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These 20-Minute Burpee Workouts Replaced His Entire Gym Routine – and Transformed His Physique

While many swear by them, most people see burpees as a form of punishment – usually dished out drill sergeant-style by overzealous bootcamp PTs. Often the final blow in an already brutal workout, burpees are designed to test cardiovascular fitness, muscular endurance and mental grit. Love them or loathe them, they deliver every time.

For Max Edwards – aka Busy Dad Training on YouTube – they became a simple but highly effective way to stay fit and lean during lockdown. Once a committed powerlifter, spending upwards of 80 minutes a day in the gym, he was forced to overhaul his approach due to fatherhood, lockdown and a schedule that no longer allowed for long, structured lifting sessions.

‘Even though I was putting in hours and hours into the gym and even though my physique was pretty good, I wasn’t becoming truly excellent at any physical discipline,’ he explained in a YouTube video.

‘I loved the intentionality of training,’ says Edwards. ‘The fact that every session has a point, every rep in every set is helping you get towards a training goal, and I loved that there was a clear way of gauging progression – feeling like I was developing competence and moving towards mastery.’

Why He Walked Away From Powerlifting

Despite that structure, Edwards began to question whether powerlifting was sustainable long-term.

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‘My sessions were very taxing on my central nervous system. I was exhausted between sessions. It felt as if I needed at least nine hours of sleep each night just to function.’

He also noted that his appetite was consistently high.

But the biggest drawback was time.

‘I could not justify taking 80 minutes a day away from my family for what felt like a self-centred pursuit,’ he says.

A Simpler Approach That Stuck

‘Over the course of that year I fixed my relationship with alcohol and I developed, for the first time in my adult life, a relationship with physical training,’ says Edwards.

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With limited time and no access to equipment, he turned to burpees. Just two variations, four times a week, with each session lasting 20 minutes.

‘My approach in each workout was very simple. On a six-count training day I would do as many six-counts as I possibly could within 20 minutes. On a Navy Seal training day I would do as many Navy Seal burpees as I could within 20 minutes – then in the next workout I would simply try to beat the number I had managed previously.’

This style of training is known as AMRAP – as many reps (or rounds) as possible.

The Results

Edwards initially saw the routine as nothing more than a six-month stopgap to stay in shape. But that quickly changed.

‘I remember catching sight of myself in the mirror one morning and I was utterly baffled by the man I saw looking back at me.’

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He found himself in the best shape of his life. His energy levels improved, his resting heart rate dropped and his physique changed in ways that powerlifting hadn’t quite delivered.

‘It has been five years since I have set foot in a gym,’ he says. ‘That six-month training practice has become the defining training practice of my life – and for five years I have trained for no more than 80 minutes per week.’

The Burpee Workouts

1/ 6-Count Burpees

20-minute AMRAP, twice a week

How to do them:

  • Start standing, feet shoulder-width apart
  • Crouch down and place your hands on the floor (count 1)
  • Jump your feet back into a high plank (count 2)
  • Lower into the bottom of a push-up (count 3)
  • Push back up to plank (count 4)
  • Jump your feet forward to your hands (count 5)
  • Stand up straight (count 6)

20-minute AMRAP, twice a week

How to do them:

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  • Start standing, feet shoulder-width apart
  • Crouch down and place your hands on the floor
  • Jump your feet back into a high plank
  • Perform a push-up (chest to floor)
  • At the top, bring your right knee to your right elbow, then return
  • Perform another push-up
  • Bring your left knee to your left elbow, then return
  • Perform a third push-up
  • Jump your feet forward
  • Stand or jump to finish

Headshot of Kate Neudecker

Kate is a fitness writer for Men’s Health UK where she contributes regular workouts, training tips and nutrition guides. She has a post graduate diploma in Sports Performance Nutrition and before joining Men’s Health she was a nutritionist, fitness writer and personal trainer with over 5k hours coaching on the gym floor. Kate has a keen interest in volunteering for animal shelters and when she isn’t lifting weights in her garden, she can be found walking her rescue dog.

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