Workout wimps, watch out: The top two fitness trends for 2014 are high-intensity interval training, such as P90X and CrossFit, and body-weight training such as push-ups, pull-ups, sit-ups and planks, according to an annual fitness trends survey out today.
http://www.rgj.com/usatoday/article/3009699
http://www.rgj.com/usatoday/article/3009699
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