Two simple adjustments will make your dumbbell curls much more effective. Check ’em out.
https://www.t-nation.com/videos/tip-two-simple-ways-to-build-bigger-biceps
Two simple adjustments will make your dumbbell curls much more effective. Check ’em out.
https://www.t-nation.com/videos/tip-two-simple-ways-to-build-bigger-biceps