you slept – that's your goal, he says. While you may feel the need to sleep a little longer when training for a half-marathon or marathon, the key to full recovery is not just how many hours of sleep you get, but the quality of your sleep. "For

Hospital, London (sportsmedicineservices.com). "It's a system that can be terminal if you lose sight of your mile splits, so I always advise marathon runners to do negative splits, speeding up in the second half of the race." Your body will still be relying

you slept – that's your goal, he says. While you may feel the need to sleep a little longer when training for a half-marathon or marathon, the key to full recovery is not just how many hours of sleep you get, but the quality of your sleep. "For

properly." Getty Images RUNNING WORKS Almost half of drivers name their daily commute to work as the most stressful aspect of their lives, according to recent data from the Stress Management Association. By running, you'll be less stressed and get