Millennials, Gen Y need to eat less, workout more to stave off obesity: York U study

Share

TORONTO, September 21, 2015If you are struggling with weight gain, you might be surprised to know that your parents had it easier – they could eat more and exercise less, and still avoid obesity, according to a recent study out of York University’s Faculty of Health.

“Our study results suggest that if you are 40 years old now, you'd have to eat even less and exercise more than  if you were a 40 year old in 1971, to prevent gaining weight,” says Professor Jennifer Kuk in the School of Kinesiology and Health Science. “However, it also indicates there may be other specific changes contributing to the rise in obesity beyond just diet and exercise.”

The study, funded by the Canadian Institutes of Health Research, analyzed dietary data of nearly 36,400 American adults collected by the National Health and Nutrition Survey between 1971 and 2008. The available physical activity frequency data, of 14,419 adults in the 1988 to 2006 period was also used.

“We observe that for a given amount of self-reported food intake, people will be about 10 per cent heavier in 2008 than in 1971, and about five per cent heavier for a given amount of physical activity level in 1988 than 2006,” notes Ruth Brown, lead researcher and York U graduate student, adding, “These secular changes may in part explain why we have seen the dramatic rise in obesity.”

The study, “Secular differences in the association between caloric intake, macronutrient intake and physical activity with obesity,” is featured in the upcoming issue of Obesity Research & Clinical Practice.

The researchers point out that although several studies have shown that eating less and exercising more results in weight loss, in the long term, they are proven to be ineffective.

“This is because weight management is actually much more complex than just ‘energy in’ versus ‘energy out’,” says Kuk. “That’s similar to saying your investment account balance is simply your deposits subtracting your withdrawals and not accounting for all the other things that affect your balance like stock market fluctuations, bank fees or currency exchange rates.”

Kuk further explains that our body weight is impacted by our lifestyle and environment, such as medication use, environmental pollutants, genetics, timing of food intake, stress, gut bacteria and even nighttime light exposure. “Ultimately, maintaining a healthy body weight is now more challenging than ever.”

York University is helping to shape the global thinkers and thinking that will define tomorrow. York U’s unwavering commitment to excellence reflects a rich diversity of perspectives and a strong sense of social responsibility that sets us apart. A York U degree empowers graduates to thrive in the world and achieve their life goals through a rigorous academic foundation balanced by real-world experiential education. As a globally recognized research centre, York U is fully engaged in the critical discussions that lead to innovative solutions to the most pressing local and global social challenges. York U’s 11 faculties and 25 research centres are thinking bigger, broader and more globally, partnering with 280 leading universities worldwide. York U’s community is strong − 55,000 students, 7,000 faculty and staff, and more than 275,000 alumni.


Media Contact:
Gloria Suhasini, York University Media Relations, 416 736 2100 ext. 22094, suhasini@yorku.ca