How To: Alternating Dumbbell Curl (Home and Gym) | Vitamin Makers Blog

... if you dont hold contraction your using momentum. you shoul suscribe to my channel videos and stuff will be in winter but im getting in shape and filming in 2 months in ameria so suscribe tell people but good post. kragDuck says: ...

Source: http://www.vitaminmakers.co.cc/how-to-alternating-dumbbell-curl-home-and-gym/

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