Jogging solo bad for your brain: "Far from being a healthy pursuit, jogging on your own could be bad for your health. New research has found that it raises stress levels and stifles the production of new brain cells. Harvard University psychology Professor Elizabeth Gould, who led the research, said: "These results suggest that, in the absence of social interaction, a normally beneficial experience can exert a potentially deleterious influence on the brain." Writing in the journal Nature, Professor Gould said her results showed that, contrary to accepted wisdom, jogging is not always good for you."




Pot blows your memory: "People who regularly smoke marijuana may find their memories growing hazy over time, a study suggests. In a study of long-term and shorter-term marijuana users, researchers in Greece found that both groups performed more poorly on tests of memory, attention and other cognitive abilities than a comparison group who'd only occasionally used the drug. Long-term users - who'd smoked four or more joints per week for at least 10 years - showed the greatest deficits. The findings, published in the journal Neurology on Monday, add to the conflicting body of research on the effects of marijuana on the brain. While many studies have suggested that long-time pot smoking dulls memory, attention span and mental acuity, some have found no large differences in these skills between marijuana users and non-users."