'TRF Fitness Proper Step Up'

'Step-ups are great exercises for building strength and endurance in your legs while doing the same with your core.  BRut runs us from beginner through intermediate variations on the classic step-up.' 

Tags: core strength , strength training , strength training for runners , TRF Fitness , The Runner's Flat , Scott Gall , Proper Step Ups , Rutledge Fitness , Cross-Training for Runners

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