I have been working out on and off all my adult life, I recently (less than a year ago) renewed my resistance training (Iron lifting, classic movements, no machines) and my right arm (I’m right handed) has not kept up with my left, my pectoral, biceps, and triceps along with shoulder stabilizers seem to be getting comparatively weaker and weaker relative to my left side group.
I am very scrupulous with form, and this weakness occur with dumbbells as well as barbell, the right side is less strong, and also gets tired earlier, I can usually get a few more reps out of the left in all upperbody lifts, also the right is getting more venous overall, can really see quite allot more veins throughout the upperarm and shoulder/chest on the weaker side, the left side is quite a bit larger now as well, left upper arm is approx. 16.5<.8 right is approx. 15.8 < 16.0.
chiropractor finds no evidence of nerve inpingement, and I feel I cannot “flex” the right as tightly or hard as the left.
Should I do a one side (right) only routine for a month or so or what?
note: I have an unusualy strong and large right forearm from massive martial arts weapons training in my teens.