The scientific skinny on fitness

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In a bid to give a definitive answer as to the scientific advice as to what is the best physical exercise for health, New Scientist gives Nine Facts About Fitness, based on a distillation of the decades of scientific studies. Questions answered include: What counts as exercise?; How much exercise and how often?; How do you know if you're getting fit?; Is pumping iron good for you?: Can jogging kill you?; and Do you need to 'push fluids'?
(New Scientist) | For further info...