Build bigger biceps – faster (how to do Dumbbell Concentration Curl)

In this video Moji shared his tips on how to build bigger biceps faster by performing dumbbell concentration curl.

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Moji Oluwa is a a 35 times Natural Bodybuilding Champion. (Natural = No Drugs!) and IFPA Pro.He is also an elite trainer and the mastermind of the Miami Muscle System, the easiest, clearest, most advanced muscle building program available.

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