Been in the gym for a while but still looking for better ways to build lean mass? Try the Growing Strong workout: http://muscle.ms/GrowStg8 pic.twitter.com/3j4KIFt508

Been in the gym for a while but still looking for better ways to build lean mass? Try the Growing Strong workout: http://muscle.ms/GrowStg8 

First seen here > https://twitter.com/Muscle_Strength/status/918642645743923200

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