Back-Friendly Core Workout | 4 Ways to Boost Lower-Body Workouts

10-Minute Core Workout that Won't Hurt Your Back If core-strengthening moves like crunches and twists bother your back, give this routine a try. 4 Ways to Boost Lower-Body Workouts  Looking for a challenge? Here are 4 ways to take your lower-body workouts to the next level. Take Your Walk to a Run in 5 Easy Steps Use this step-by-step guide from RunKeeper to transition from walking to running.   Copyright 2014 MyFitnessPal, Inc. To unsubscribe or change your email preferences, click here. MyFitnessPal, Inc. | 525 Brannan Street, San Francisco, CA 94107

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