.@Team_Optimum athlete Charles Glass drops some knowledge on exercises that help build the back: http://muscle.ms/GlassBack pic.twitter.com/HOHHXiXs6L

. athlete Charles Glass drops some knowledge on exercises that help build the back: http://muscle.ms/GlassBack 

First seen here > https://twitter.com/Muscle_Strength/status/854469673546547205

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