Governments and experts are calling for action to combat the medical, economic and social costs of rising rates of preventable conditions like obesity, diabetes, cardiovascular disease and some cancers, states an article in CMAJ (Canadian Medical Association Journal). To date, governments in Canada have taken little legislative action to promote healthy nutrition and physical activity...

Helmets reduce the risk of head injury among skiers and snowboarders by 35% with no evidence of an increased risk of neck injury, states an article in CMAJ (Canadian Medical Association Journal). Some suggest that helmets may increase the risk of neck injury in a crash or fall, particularly in children because of their greater head to body ratio...

The commercial weight-loss industry is big business in North America, and the $50 billion industry should be regulated to safeguard people's health, write Dr. Yoni Freedhoff, Dr. Arya Sharma and the CMAJ editorial team http://www.cmaj.ca/press/pg367.pdf.