Is it best if you're looking to build some arm muscle to:
a, Use the maximum weights you're able to lift, ones where you're only able to do about five reps in a set with them
or
b, Use the second heaviest weights you can lift when you're able to do 15 reps in a set?
a, Use the maximum weights you're able to lift, ones where you're only able to do about five reps in a set with them
or
b, Use the second heaviest weights you can lift when you're able to do 15 reps in a set?