Fitness
Fitness, Not Weight, Is the Best Marker of Health, Finds New Study
We’ve long known that your weight isn’t necessarily linked to your health.
Firstly, because weight doesn’t indicate how much of you is muscle and how much is fat. Secondly, because weight doesn’t indicate what’s going on inside our body, like how much visceral fat we have (the type that sits around organs and can be problematic for health) or how well our heart, liver, gut, and other organs are working.
Yet, we’re never not being sold weight loss solutions. They pop up when we’re scrolling Instagram, are plastered all over train stations and are sometimes recommended by medical professionals.
Why, given there are so many other markers of health that are much more interesting and, importantly, useful for indicating our health? Well, that’s a big question. Instead, let’s look at a more practical question: what exactly are those better measurements for an insight into how healthy we are?
That’s exactly what a new study, published in the British Journal of Sports Medicine, looked at.
The Study
The study, from researchers at the University of Virginia, was a systematic review and meta-analysis of research looking at whether cardiorespiratory fitness or body mass index (BMI) had a bigger effect on cardiovascular disease and all-cause mortality risk.
They were looking at this because obesity rates have increased significantly over the past four decades, with roughly two in five adults now classified as overweight or obese. With that, more people are at risk of cardiovascular disease and mortality.
Public health strategy tends to involve promoting weight loss to increase health outcomes for these people. The problem? Many regain weight within 10 years, and intentional weight loss alone has not consistently shown improvements in mortality risk.
One thing that has been proven to reduce the risk of cardiovascular disease and death is being fit – so much so that the authors of this study suggested it could be the fifth ‘vital sign’.
While studies have already been done comparing BMI to fitness before, a lot of them had issues with their methods. Researchers wanted to study the updated literature to find out once and for all what is the most important measurement of health.
So, they analysed 20 articles, resulting in a total of 398,716 observations.
The Results
The biggest result from this study is that overweight-fit and obese-fit people had the same risk of all-cause mortality as normal weight-fit individuals. A closer deep dive into the stats shows:
- Individuals were classified as fit if their exercise stress test score (which was either estimated or directly measured by VO2max) placed them above the 20th percentile within their age group.
- Compared with normal weight-fit individuals, there was a two-fold increased risk of all-cause mortality in unfit people who were normal weight, overweight and obese.
- Similarly, compared with normal weight-fit individuals, there was no greater
risk for cardiovascular disease in fit people who were overweight or obese. - Unfit people who were normal weight, overweight and obese had a 2-3 fold increased risk of cardiovascular disease.
What That Means For Us
Being fit is protective against cardiovascular disease and dying, regardless of your body weight and BMI.
Read that again and again.
If you need to hear it from a scientist, Siddhartha Angadi, associate professor of exercise physiology at the University of Virginia School of Education and Human Development and corresponding author of the study says: ‘Exercise is more than just a way to expend calories. It is excellent “medicine” to optimise overall health and can largely reduce the risk of cardiovascular disease and all-cause death for people of all sizes.’
The focus should be moving more, regardless of your BMI, and without the arbitrary goal of ‘weight loss’. ‘The largest reduction in all-cause and cardiovascular disease mortality risk occurs when completely sedentary individuals increase their physical activity modestly,’ says Angadi.
And if you need another reason to find movement you love and do it regularly for your health, rather than focusing on your weight, they add: ‘Repetitive cycles of losing and gaining weight – yo-yo dieting – is associated with numerous health risks comparable to those of obesity itself. Improving cardiorespiratory fitness may help avoid the adverse health effects associated with chronic yo-yo dieting.’
The Bottom Line
Set goals that improve your fitness, whether that’s Couch25K, signing up to a new gym or training for a race, rather than ones that centre weight.
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Fitness
Study finds 5 more minutes of exercise could reduce your risk of death by 10%
The universal quest for immortality continues, and new research has hinted at a small lifestyle change that could reduce overall death rates in countries if we start taking our movement more seriously.
Conducted by a global research team, the study named ‘Deaths potentially averted by small changes in physical activity and sedentary time: an individual participant data meta-analysis of prospective cohort studies’ was published in The Lancet and suggested that adding five more minutes of physical exercise a day to your life could reduce death rates by 6 per cent.
Conducted on cohorts wearing on-person devices from Norway, Sweden and the USA, scientists analysed activity and sedentary levels to deduce what was causing higher death rates and found that a little change could go a long way.
With the help of the study’s author and additional experts from the field, we delved into the details and uncovered exactly what we need to do to make sure we are maximising our health before it’s too late.
A little change makes all the difference
We already know that we should all be getting out and exercising to ensure everything in our bodies is running smoothly, but just how important is that daily movement and could it be contributing to national mortality rates?
Professor Ulf Ekelund works in the Physical Activity and Health department at the Norwegian School of Sport Sciences and was one of the authors of the study. He broke down the data for HELLO!.
The professor explained: “We estimated the number of deaths potentially prevented by five and ten-minute increases in moderate intensity physical activity if all individuals in the population adhered to this increase.
“We analysed the data using two different approaches:
- ‘High-risk approach’ comprising the least active 20 per cent of the population
- ‘Population approach’ comprising 80 per cent of the population (excluding the most active 20 per cent).
He continued: “We found that six per cent and ten per cent of all deaths might be prevented in the two different scenarios, respectively, if all individuals made these changes.
“If an individual is completely inactive, every little move counts. For example, the least active 20 per cent in our study sample were only active for an average of about two minutes per day of moderate intensity. If all these individuals increased their activity by five minutes per day, it might reduce the number of deaths by six per cent annually.”
Dr Darren Player, a professor in Musculoskeletal Bioengineering at University College London, who was not involved in the study, shared his interpretation of the data with us and added: “The key finding was that an increase in Moderate-to-Vigorous Physical Activity (MVPA) by only five minutes per day for the least active individuals prevented 6 per cent of all deaths. This effect could extend to as much as 10 per cent in all individuals, except for those who are already very active.”
Exercise versus moderate intensity
In terms of how to achieve the correct level of activity and movement, we have to understand the difference between physical activity and moderately intense movement. They are different and will yield different results.
Professor Ulf explained: “There is a clear distinction between moderate intensity activity and exercise. Brisk walking is an excellent type of moderate intensity, whereas exercise is defined as something people do with the purpose to enhance fitness and/or health. It is structured and repetitive. Exercise is only a small proportion of all the physical activity people do.
“Physical activity [PA] is any bodily movement that increases energy expenditure above resting levels. It can be conducted with different intensities from very low to very strenuous. Exercise is a subset of PA which is planned, structured and done with a specific purpose.”
Could any of this add years onto our lives?
While this study was specifically about reducing death rates through exercise and movement, it made us wonder how it would affect the number of years we could all expect to live. Would incorporating an extra five minutes of movement add any time to the general life expectancy?
Dr Darren referred to data from the UK Biobank to share his estimations. He said: “This is quite a difficult question to answer, but there is some evidence. The following paper suggests that there could be an increase in life expectancy of 0.9 years for inactive women and up to 1.4 years for inactive men.
“The increases are dependent on the nature of physical activity, with higher intensity and greater volume (total amount of exercise) being the key factors. This is a large UK Biobank study, which does have some strengths for the analyses.”
He continued: “However, the factors that contribute to life expectancy and mortality are complex and varied, with further studies required to understand the picture fully. Particularly, the effect of resistance training combined with other forms of physical activity is likely to have a greater effect than one type of activity alone. Further research is required in this area to provide suitable evidence.”
What type of exercises can I do during my five extra minutes a day?
According to the NHS, there are a variety of movements that you can incorporate into your routine to make sure you are hitting the target of five extra minutes of exercise per day to increase your longevity.
These range from simple activities like making a cup of tea to pushing a lawnmower and dancing around your living room for fitness, depending on the intensity you are able for. While the study suggested five minutes of moderate intensity exercise, the health service broke down its recommendations into sections based on vigour:
Light activity:
- Getting up to make a cup of tea
- Moving around your home
- Walking at a slow pace
- Cleaning and dusting
- Vacuuming
Moderate activity:
- Walking for health
- Water aerobics
- Riding a bike
- Dance for fitness
- Pushing a lawnmower
- Hiking
Intense activity:
- Running
- Swimming
- Football
- Hiking uphill
- Martial arts
It also suggested some easy-to-do strength exercises that involve using a kitchen chair or filled bottles of water as props:
- Sit-to-stand
- Mini squats
- Calf raises
- Standing sideways leg lift
- Standing leg extension
- Wall press-up
- Bicep curls
Fitness
Fitness Class Volume Tied to Exercise Intensity Perception
About The Study: In this comparative effectiveness study, reducing music volume in group fitness classes did not lead to meaningful reductions in perceived exertion and may reduce the risk of noise-induced hearing loss. These findings support implementing safer sound practices in fitness environments and underscore the need for increased awareness and education on hearing protection.
Fitness
Reward yourself by exercising regularly at One to One Fitness | CWRU Newsroom | Case Western Reserve University
Now is the time to recommit to your health in time to feel your best for all your summer activities! One to One Fitness Center offers several ways to save in March.
Members of the Case Western Reserve University community can take advantage of sign-up specials designed to reward themselves for creating healthy habits.
Individuals can get 50% off the initiation fee (regularly $50 plus tax) and earn back what they do pay by exercising eight or more days in both April and May. Learn more online about this deal on initiation fees.
Students also can get additional savings:
- Graduate students who are enrolled for the spring semester receive summer membership free.
- With Spartan Shape Up memberships, affiliate students pay just $40 per month for membership from now through May, and no initiation fee or security deposit is required.
- Students also can pay $44 plus tax per month with a month-to-month, ongoing plan. No initiation fee or security deposit required.
One to One Fitness Center, owned and operated by CWRU, is known for offering personal, professional, friendly and clean services. Memberships include full access to the 28,000-square-foot fitness center, group exercise classes, validated parking in Lot 53, towel and locker service, and member discounts on programs and services.
Members also can add their spouse or partner to their account for $30 plus tax per month. The center also offers personal training, Pilates Reformer, massage therapy and sound bath therapy, swim lessons, and more.
Visit the One to One Fitness Center website, email onetoone@case.edu or call 216.368.1121 for more information.
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