2016年4月7日木曜日

Why you need a strong core, even if you can only dream of a six-pack

Core matters.

https://www.washingtonpost.com/lifestyle/wellness/why-you-need-a-strong-core-even-if-you-can-only-dream-of-a-six-pack/2016/03/29/6c24f994-eae6-11e5-bc08-3e03a5b41910_story.html


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