A healthy diet and the right amount of exercise are key players in treating and preventing obesity but we still know little about the relationship both factors have with each other. A new study now reveals that an increase in physical activity is linked to an improvement in diet quality.
Many questions arise when trying to lose weight. Would it be better to start on a diet and then do exercise, or the other way around? And how much does one compensate the other?
“Understanding the interaction between exercise and a healthy diet could improve preventative and therapeutic measures against obesity by strengthening current approaches and treatments,” explains Miguel Alonso Alonso, researcher at Harvard University (USA) who has published a bibliographical compilation on the subject, to SINC.
The data from epidemiological studies suggest that tendencies towards a healthy diet and the right amount of physical exercise often come hand in hand. Furthermore, an increase in physical activity is usually linked to a parallel improvement in diet quality.
Exercise also brings benefits such as an increase in sensitivity to physiological signs of fullness. This not only means that appetite can be controlled better but it also modifies hedonic responses to food stimuli. Therefore, benefits can be classified as those that occur in the short term (of metabolic predominance) and those that are seen in the long term (of behavioural predominance).
According to Alonso Alonso, “physical exercise seems to encourage a healthy diet. In fact, when exercise is added to a weight-loss diet, treatment of obesity is more successful and the diet is adhered to in the long run.”
The Truth About Lifestyle and Heart Disease
The truth is, drugs won’t cure heart disease, though it can certainly help control it. That means your lifestyle does matter - a lot.
For starters, it’s likely that some aspects of your lifestyle may have put you at risk for heart disease. These are called risk factors. Here’s a list of common risk factors for heart disease:
Having high blood pressure
Having unhealthy blood fat and cholesterol levels
Being physically inactive
Being over 55 years old for men and over 65 years old for women
Having family members who had heart disease or a heart attack early in life: under 55 for your father or brother; under 65 for your mother or sister
Some heart disease risk factors you can’t control, such as your age or health problems of your parents. However, some risk factors are related to your lifestyle, such as smoking, being overweight, and having an unhealthy diet. These lifestyle factors may have helped contribute to your heart disease. And these same risk factors will continue to make your heart disease get worse.
Luckily, the opposite is true as well. Adopting a heart-healthy diet and a healthier lifestyle can improve your health, even if you already have high blood pressure or other forms of heart disease. Here’s what a heart-healthy lifestyle can do for you:
Lower your blood pressure
Lower your bad cholesterol and triglyceride (blood fat) levels
Ease the stress on your heart
Lower your risk of heart attack
Lower your risk of stroke
Prolong your life
The authors of the study state how important it is for social policy to encourage and facilitate sport and physical exercise amongst the population. This should be present in both schools and our urban environment or daily lives through the use of public transport or availability of pedestrianised areas and sports facilities.
Exercise modifies the brain
Eating and physical activity are behaviours and are therefore influenced by cognitive processes that are a result of activity in different areas of the brain. Previous studies have already assessed changes in the brain and cognitive functions in relation to exercise: regular physical exercise causes changes in the working and structure of the brain.
The experts point out that these changes seem to have a certain specificity. The Harvard researcher supports the notion that “regular exercise improves output in tests that measure the state of the brain’s executive functions and increases the amount of grey matter and prefrontal connections.”
Inhibitory control is one of the executive functions of the brain and is basically the ability to suppress inadequate and non-conforming answers to an aim (the opposite of this would be impulsiveness), which makes modification or self-regulations of a behaviour possible.
With regards to losing weight and sustaining weight loss in the long run, various recent studies suggest that executive functions such as inhibitory control and optimal functioning of the brain’s prefrontal areas could be the key to success. This success is mainly the fruit of a behavioural change. Inhibitory control could also help to prevent weight gain in healthy people.
The researcher outlines that “in time, exercise produces a potentiating effect of executive functions including the ability for inhibitory control, which can help us to resist the many temptations that we are faced with everyday in a society where food, especially hypercaloric food, is more and more omnipresent.”
Spain – leader in obesity
There has been an alarming rise in cases of obesity in Spain in recent years, so much so that prevalence in various areas of the country is higher than in many parts of the USA, which is traditionally thought of as the paradigm of obesity in the western world.
Furthermore, along with other Mediterranean countries, Spain has one of the highest rates of childhood obesity in Europe. The experts are urging society to become aware of the problem and join forces to prevent and treat all types of obesity.
R. J. Joseph, M. Alonso-Alonso, D. S. Bond, A. Pascual-Leone y G. L. Blackburn. “The neurocognitive connection between physical activity and eating behavior”. Obesity Reviews 12, 800 octubre de 2011.
Miguel Alonso-Alonso; Harvard University
FECYT - Spanish Foundation for Science and Technology