Are curls really for girls Or do they have any sort of benefits to build up the mass of my arms. Right now I've got some skinny arms and I'm only 23 years old. I have been training for the past 4 years off and on
someone told me preacher curls were really good because they can isolate your bicep. What are your thoughts
someone told me preacher curls were really good because they can isolate your bicep. What are your thoughts