... two to three high-intensity workouts during the week, mixed in with lighter workouts like yoga, walking or weight training, say fitness experts. And mix up your workouts throughout the week-either with cardio, core and flexibility each time, or a ...
http://online.wsj.com/article/SB10001424127887323608504579024773708604060.html
http://online.wsj.com/article/SB10001424127887323608504579024773708604060.html
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