How much exercise is enough?

Exercise has had a Goldilocks problem, with experts debating just how much exercise is too little, too much or just the right amount to improve health and longevity.

Two new, impressively large-scale, studies provide some clarity, suggesting that the ideal dose of exercise for a long life is a bit more than many of us currently believe we should get, but less than many of us might expect. The studies also found that prolonged or intense exercise is unlikely to be harmful and could add years to people’s lives.

No one doubts, of course, that any amount of exercise is better than none. Like medicine, exercise is known to reduce risks for many diseases and premature death.

But unlike medicine, exercise does not come with dosing instructions. The current broad guidelines from governmental and health organizations call for 150 minutes of moderate exercise per week to build and maintain health and fitness.

But whether that amount of exercise represents the least amount that someone should do — the minimum recommended dose — or the ideal amount has not been certain.

Scientists also have not known whether there is a safe upper limit on exercise, beyond which its effects become potentially dangerous; and whether some intensities of exercise are more effective than others at prolonging lives.

So the new studies, both of which were published last week in JAMA Internal Medicine, helpfully tackle those questions.

In the broader of the two studies, researchers with the National Cancer Institute, Harvard University, and other institutions gathered and pooled data about people’s exercise habits from six large, ongoing health surveys, winding up with information about more than 661,000 adults, most of them middle-aged.

Using this data, the researchers stratified the adults by their weekly exercise time, from those who did not exercise at all to those who worked out for 10 times of the current recommendations or more (meaning that the exercised moderately for 25 hours per week or more).

Then they compared 14 years’ worth of death records for the group.

They found that, unsurprisingly, the people who did not exercise at all were at the highest risk of early death.

But those who exercised a little, not meeting the recommendations but doing something, lowered their risk of premature death by 20 percent.

Those who met the guidelines precisely, completing 150 minutes per week of moderate exercise, enjoyed greater longevity benefits and 31 percent less risk of dying during the 14-year period compared with those who never exercised.

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The sweet spot for exercise benefits, however, came among those who tripled the recommended level of exercise, working out moderately, mostly by walking, for 450 minutes per week, or a little more than an hour per day. Those people were 39 percent less likely to die prematurely than people who never exercised.

At that point, the benefits plateaued, the researchers found, but they never significantly declined. Those few individuals engaging in 10 times or more the recommended exercise dose gained about the same reduction in mortality risk as people who simply met the guidelines. They did not gain significantly more health bang for all of those additional hours spent sweating. But they also did not increase their risk of dying young.

The other new study of exercise and mortality reached a somewhat similar conclusion about intensity. While a few recent studies have intimated that frequent, strenuous exercise might contribute to early mortality, the new study found the reverse.

For this study, Australian researchers closely examined health survey data for more than 200,000 Australian adults, determining how much time each person spent exercising and how much of that exercise qualified as vigorous, such as running instead of walking, or playing competitive singles tennis versus a sociable doubles game.

Then, as with the other study, they checked death statistics. And as in the other study, they found that meeting the exercise guidelines substantially reduced the risk of early death, even if someone’s exercise was moderate, such as walking.

But if someone engaged in even occasional vigorous exercise, he or she gained a small but not unimportant additional reduction in mortality. Those who spent up to 30 percent of their weekly exercise time in vigorous activities were 9 percent less likely to die prematurely than people who exercised for the same amount of time but always moderately, while those who spent more than 30 percent of their exercise time in strenuous activities gained an extra 13 percent reduction in early mortality, compared with people who never broke much of a sweat. The researchers did not note any increase in mortality, even among those few people completing the largest amounts of intense exercise.

Of course, these studies relied on people’s shaky recall of exercise habits and were not randomized experiments, so can’t prove that any exercise dose caused changes in mortality risk, only that exercise and death risks were associated.

Still, the associations were strong and consistent and the takeaway message seems straightforward, according to the researchers.

Anyone who is physically capable of activity should try to “reach at least 150 minutes of physical activity per week and have around 20 to 30 minutes of that be vigorous activity,” says Klaus Gebel, a senior research fellow at James Cook University in Cairns, Australia, who led the second study. And a larger dose, for those who are so inclined, does not seem to be unsafe, he said.

Originally posted health.heraldtribune.com                                                                                                                        15th April 2015

For more information regarding how much exercise you should try and engage in weekly review the National guidelines from the Department of Health or contact one of the physiotherapists at Jubilee Sports Physiotherapy.

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16:52 05 Mar 24
I came to Jubilee Sports Physio for help on how to exersise and get fit without injuring myself constantly.During my initial consultation Michael said, I was standing wrong, sitting wrong and exersises I did were not suitable for my body.After four sessions, 15 minutes of daily exercises in between and I can go on hikes, lift weights and feel many years younger.I now have the life I want and very grateful to Jubilee Sports Physio, for their professionalism from booking, greeting and being able to do all I want physically.I highly recommend Jubilee Sports
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I would like to express my sincere appreciation for the exceptional care provided by Michael and James for attending to my son, both before and after his shoulder reconstruction. Michael and James' combination of kindness and professionalism played an important role in helping my son navigate through what was his first significant life challenge.They both demonstrated an unwavering commitment to my son's well-being, providing not only expert physiotherapy but also a level of compassionate support that went above and beyond.Thank you Jubilee team for your outstanding commitment to patient care. It's reassuring to know that professionals like Michael and James are dedicated to not just addressing physical challenges but also fostering a supportive and empathetic environment for individuals facing health setbacks. The receptions ladies were kind and helpful too.
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06:00 18 Dec 23
Over a period of 4 years my husband and I have had the expertise and professionalism of Michael Gabriel and staff at Jubilee Sports Physiotherapy Each of our ageing conditions required commitment to exercises to improve. When the conditions were clearly explained we gained confidence and understanding of realistic outcomes. We feel very fortunate for all of our treatments..and highly recommend Michael and staff.
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The whole Jubilee team is fantastic. They are professional, knowledgeable and have always gotten me back playing football as quick as possible!
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The team at Jubilee have been looking after me for over 15 years. Specially Michael with the help of Kieran. They have rehabbed me through 4 major surgeries as well as long standing injuries. It is because of these guys, I am able to still be involved in the game I love, stretching my career out as long as possible. In addition, my whole family is part of the Jubilee family
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I have relied on Michael Gabriel for my physiotherapy needs for a number of years now. His professional work has allowed me to continue to chase the love I have for outdoors recreation.
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Michael and his team are the best. So professional and knowledgeable and have kept me moving for years.
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I have been a patient of Jubilee Sports Physio for many years, being treated for various injuries & chronic conditions. Michael’s diagnostic skills are excellent. I can highly recommend this practice for their care, proficiency & friendliness.
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Micheal has helped over the years to heal and help with my injuries.. The entire team gives a five star help. I can’t praise them enough…Thank you so much
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Michael has treated me on a number of occasions. He is very professional and very easy to talk to. He obviously knows his stuff and never fails to set you on the right path with his treatments
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"I have been going to Jubilee Physiotherapy for many years.Very professional from the receptionists to the principal Physioswith lots of experience and straight to the point thatsave time and money"
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I have been attending Jubilee physio, on and off, for many years.In fact three generations of my family are presently receiving treatment there. I have had several of the physiotherapist at Jubilee work on different problems and have found them all to be professional, knowledgeable and very caring in their treatment.
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The the treatment I received for injury was first class. Caring, knowledgeable and highly professional. The electronic home exercising provided to me showed me the required exercises so I was not let to a piece of papers directing me. Loved the app. This physio is the best I have used. Highly recommended.
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I have attended Jubilee Physiotherapy for many years and have always had a positive experience. The staff are professional and knowledgeable. I always feel comfortable and safe in their care.My therapist, Samuel Leslie, knew exactly how to treat my new neck issue. As a result, I have made a very good recovery.
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The guys at Jubilee are amazing! Been going for a couple years and each time I’ve had a great experience. Massive shout out and thanks to our team Physio Sam for helping me with my rehab and recovery. He’s helped improve my overall game and has made me stronger than before. He’s a legend. Would highly recommend, overall fantastic experience!
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