New member here. I've always been naturally skinny, even when I haven't been in great shape. I've recently started making an effort to do some strength workouts, mostly with fitness bands and the machines at apartment complex. It's perhaps not the greatest setup, no free weights, but it's the best I've got without paying for a membership. Anyways, the routine for the past 7 months has been around 45 minutes 1-2 times a week. I've gotten stronger and have put on some weight (hopefully muscle), but I don't seem to be getting anymore defined. Mostly, upper arms look flabby as eff, and I'm wondering if there are specific exercises to target that area.
I listed those exercises, because you asked about exercises targeting the shoulders and upper back and in opinion all those will have some effect on that region of your body .