Navigation Links
Physical activity, healthy eating and BMI not linked in older teens: study

This release is also available in French.

Contrary to what many researchers expect, physically active older teens dont necessarily eat a healthier diet than their less-active contemporaries.

And there appeared to be no link between body mass index (BMI) values and levels of physical activity, the research showed.

The study of 900 Vancouver-area teenagers in Grades 10 through 12 was conducted by Dr. Catherine Sabiston, of McGill University, and P.R.E. Crocker, of the University of British Columbia (UBC). The results of their research conducted in Vancouver while Dr. Sabiston was still a PhD student at UBC were published in the Journal of Adolescent Health earlier this year.

Overall, said Sabiston, now an assistant professor in McGills Department of Kinesiology and Physical Education, boys reported participating in more physical activities but ate a less-healthy diet than did girls. Moreover and contrary to established wisdom in the field researchers found that people with healthier BMI values were no more likely to be physically active than those with higher, unhealthier values. Unexpectedly, it was the latter who were more likely to eat a healthier diet.

A lot of people are surprised, Dr. Sabiston said, but when you think about it, BMI doesnt have a huge impact on physical activity. And in terms of diet, it actually makes sense that someone who is not happy with their body might try to eat more healthily.

According to Sabiston, who is also director of McGills Health Behaviour and Emotion Lab, the results showed only a very weak correlation between physical activity and healthy eating, and virtually no correlation between an individuals BMI and his or her level of physical activity. The study was undertaken to test a comprehensive model of physical activity and healthy eating behaviour in teens aged 15 to 18, partially in response to two perceived problems with existing research in the field.

First of all, older adolescents are an unrepresented sample in research studies, Sabiston said. Researchers have generally looked at youths or at university populations and have completely missed this unique, intermediate age group. Second, Sabiston said, many researchers have traditionally treated physical activity and healthy eating as separate phenomena, and have only rarely explored their similarities and differences simultaneously.

The study also found a significant difference in the way boys and girls approach physical activity and healthy diet. Boys, Sabiston said, need to attach value to a healthy diet and feel confident in their ability to follow a healthy diet before theyll actually do it. Girls, she said, regardless of how they feel about their ability to eat a healthy diet, only need to feel it is important to do so before theyll eat properly.

What this study really says, Sabiston explained, is that one cannot assume that someone who is physically active necessarily eats a healthy diet or the reverse, that someone who is more sedentary or has a high BMI by definition eats a diet of junk food.

This study drives home the point that as a society, were primarily focused on extrinsic things like appearance and weight versus the betterment of health, Sabiston said. From a public health perspective, this means we should probably focus on people who are at a healthy weight or even underweight, and emphasize that healthy eating is not just about weight-change.


Contact: Mark Shainblum
McGill University

Related medicine news :

1. National Association for Sport and Physical Education Partners with S&S Worldwide to Help Improve Childrens Fitness
2. Atlanta Falcons Physical Therapy Centers Set to Launch This Fall
3. Cognitive Activities Protect Against Alzheimers -- Social and Physical Activities Not Enough
4. Physical Therapist Provides Injury Analysis for Fantasy Football
5. Empowerment Program Gets Patients on the PATH to Managing the Physical and Emotional Effects of Psoriatic Arthritis
6. This October, the American Physical Therapy Associations National Physical Therapy Month to Focus on Nations Obesity Epidemic
7. New study likely to fuel debate over annual physical exams
8. Blue Cross of California and the California Governors Council on Physical Fitness and Sports Launch Live Like a Champion Tour
9. The Cooper Institutes FITNESSGRAM Selected as Statewide Physical Fitness Assessment Tool
10. The impact of physical activity on weight-bearing knee joint
11. The Physical Therapy Profession Remains in High Demand
Post Your Comments:
(Date:11/28/2015)... ... 2015 , ... Pixel Film Studios is back again with ProPanel: Pulse ... are endless. Users have full control over angle of view, speed method, start point, ... sure to get heads to turn. , ProPanel: Pulse offers fully customizable pulsating shape ...
(Date:11/27/2015)... ... 27, 2015 , ... According to an article published November 15th ... are handling security in light of the recent terrorist attacks in Paris, other cities ... stop an attack from reaching U.S. soil. Especially around special events that may be ...
(Date:11/27/2015)... PA (PRWEB) , ... November 27, 2015 , ... ... how filthy the toilets were," said an inventor from Hillside, N.J. "Many people ... improved seat cover so that individuals will always be protected from germs." , ...
(Date:11/27/2015)... ... , ... MPWH, the No.1 Herpes-only dating community in the world, revealed that over 50% of ... than 3.7 billion people under the age of 50 – or 67% of the population ... global estimates of HSV-1 infection . , "The data shocks us highly!" said Michelle ...
(Date:11/27/2015)... ... November 27, 2015 , ... The moment you stop improving ... only fulfilling the needs of advisers and clients but going above and beyond ... top-tier customer service. However, there's always room for improvement, which is why the ...
Breaking Medicine News(10 mins):
(Date:11/26/2015)... , November 26, 2015 /PRNewswire/ ... announced the addition of the  "2016 ... the European Cell Surface Marker Testing ... Opportunities"  report to their offering.  ... the addition of the  "2016 Future ...
(Date:11/25/2015)... , Nov. 25, 2015  Linden Care, LLC, a ... treatment outcomes for patients suffering from chronic pain, said ... a Temporary Restraining Order (TRO) enjoining Express Scripts from ... companies. --> --> ... of its legal options. --> ...
(Date:11/25/2015)... , November 25, 2015 ... KTOV ) (TASE: KTOV), a biopharmaceutical company focused on ... of various clinical conditions, today announced the closing of ... Depository Shares ( ADSs ), each representing 20 ordinary ... to 3,158,900 ADSs. The ADSs and warrants were issued ...
Breaking Medicine Technology: