Doing core before you start clocking miles can save you time and help you run more efficiently.
Yoga Journal on MSN
7 essential arm-strengthening exercises (that also work your core)
These arm-strengthening exercises from yoga mirror many gym workout movements yet bring additional core-strengthening ...
Forget endless crunches. After 50, the real secret to a flatter, stronger midsection is training on your feet — where your core actually works the way it was designed to.
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