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Marijuana users substitute alcohol at 21

A recent study by University of Illinois economists found that marijuana users between 18-24 years old drastically reduced their marijuana use when they turned 21 and gained access to alcohol. The study suggests that alcohol may be substituting for marijuana, with women showing a greater decrease in marijuana use than men.

Why don't men live as long as women?

A new USC-led study found that heart disease is the main reason for the disparity in life expectancies between men and women, with female death rates decreasing 70% faster than male death rates after 1880. The study suggests that biological differences may be at play, with potential factors including diet, exercise, and genetics.

SourceUniversity of Southern California·JournalProceedings of the National Academy of Sciences·DateJul 6, 2015

Physical function and sense of autonomy determine life-space mobility in older people

Research conducted by Erja Portegijs and colleagues found that physical function and sense of autonomy are independent determinants of life-space mobility in older people. Life-space mobility, which reflects an individual's opportunities to participate in society, is affected by both physical limitations and psychological factors.

SourceAcademy of Finland·JournalJournal of the American Geriatrics Society·DateApr 9, 2014

How to stay sharp in retirement

A study by Concordia University researchers found that individuals who engage in cognitively demanding activities and enjoy doing so tend to experience less cognitive decline later in life. Additionally, those with even mild depressive symptoms are more likely to show a decline in brainpower after retirement.