The 7-7-7 biceps workout uses three ranges of motion to challenge your muscles into growth. Each set has 21 reps that should be performed with a moderate load.
Ejercicio 7-7-7 para tus bíceps - Mejor entrenamiento de brazos
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Ilyas Khaloukhoev (@workethicc_)
7-7-7's New bicep curl challenge 💪These were total murder - but
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