'Josef, what is the best time of day to exercise?" is one of the top 20 most frequently asked questions I get at parties. The answer to this question is on two levels: practicality and physiology. Practicality is about what you can do - do today, do tomorrow and continue doing. Physiology is about what works best for your body. They don't always agree.

We all know that exercise is good for you, but how good? While previous studies have shown the link between physical activity and a lower risk of premature mortality, the number of years of life expectancy gained among persons with different activity levels has been unclear - until now. In a new study from Harvard-affiliated Brigham and Women's Hospital (BWH), in collaboration with the National Cancer Institute, researchers have quantified how many years of life are gained by being physically active at different levels, among all individuals as well as among various groups having different body mass indexes (BMI).

So you've decided to eat healthier, give up high calorie foods, overly sweet snacks and sugary sodas. To quench your thirst when enjoying your lunch of lean turkey breast on whole wheat with pesto, you forgo the familiar red can and reach instead for your juice drink, contented in the knowledge that you are doing something good for your body. Or are you?

Cupcakes may be addictive, just like cocaine. A growing body of medical research at leading universities and government laboratories suggests that processed foods and sugary drinks made by the likes of PepsiCo Inc. and Kraft Foods Inc. (KFT) aren't simply unhealthy. They can hijack the brain in ways that resemble addictions to cocaine, nicotine and other drugs.

If you are trying to eat as healthy as the government wants you to, it's going to cost you: at least $7.28 a week extra, that is. A recent update of U.S. nutritional guidelines -- what used to be known as the food pyramid and is now called "My Plate" -- calls on Americans to eat more fresh foods containing potassium, dietary fiber, vitamin D and calcium.

PRECURSORY signs of cardiovascular disease can be seen in children as young as 12 who have a high intake of sugary drinks, Sydney researchers have found, which could have implications for the rates of the disease in the future. While narrowed blood vessels inside the eye are a known precursor to cardiovascular disease in adults, researchers from the Westmead Millennium Institute for medical research have for the first time looked at the link between carbohydrates, which includes sugars, and the retinal health of children.

It's a message that's got louder over the last few years: exercise doesn't work for weight loss. There was the 2009 Time magazine cover story The Myth about Exercise featuring a photo of a woman pounding a treadmill, her eyes trained on a cream-topped cupcake. It symbolised the story's thrust: research suggesting exercise won't help weight loss because it makes us eat more to make up for the kilojoules we burn. It's a message repeated recently in the new book Big Fat Lies in which author David Gillespie - a lawyer - describes exercise for weight loss as 'pointless'. But is it really true?

That's how much longer adult Ontarians would live, on average, if they could collectively overcome five unhealthy habits: smoking, excess alcohol consumption, poor diet, sedentary behaviour and stressing out. That is the conclusion of a new report from the Institute for Clinical Evaluative Sciences and Public Health Ontario.

Most of us will not be as fortunate as Madame Jeanne Calment. The Frenchwoman died at the age of 122 on August 4, 1997. Somewhat of a local celebrity in her hometown of Arles, Calment took up fencing at age 85 and was still bicycling into her second century, attributing her longevity to a diet of port wine and olive oil.

Researching topics such as health, diet, and (especially) the effectiveness of dietary supplements can be hard and time-consuming. Obscured by thousands of marketing tricks, finding the truth takes days, if not weeks of research. So, when someone puts in the time to do the research and create an infographic that makes certain aspects of these topics easy to understand, it can be a huge time saver.

Released yesterday by The Precinct Studios, 'Break the Habit' is a new commercial that aims to draw attention to the epidemic of childhood obesity in Australia....

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