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If you were a business tycoon thirty years ago you would drive a Porsche or wear a Rolex watch to show off your status. Now you are more likely to spend your bonus on a top-of-the-range mountain bike and your holidays participating in endurance events. That's because exercise and power are linked, as our workplace commentator Stephanie Hare tells us. (Image: Woman jogging on treadmill, Credit: Science Photo library.)