But do you have a dedicated arms day, though? Was hoping you'd genuinely answer that lol. Recently had an issue with my right AC joint which fucked up my routine. Only chest day irritated it, but I had to adjust my entire routine to accommodate it, which meant dropping my arms day for a while. My arm gains have visibly suffered from it. I figured out the problem, though. Was lacking calcium. I stopped drinking milk because it's loaded with hormones and then I had joint pain because my AC joint couldn't heal fast enough before my next chest day. FYI bench press applies a lot of stress on your AC joint and causes micro-fractures in the end of the bone where your collar bone meets your shoulder. It's usually fine because that mostly heals before your next chest day but if you aren't getting any calcium the damage will add up and your shoulder will be fucked. I picked up some calcium supplements and the problem went away almost overnight. Also, this isn't directed just at you but at anyone browsing s/Fitness, but if you do supplement with calcium, you should know that it blocks the absorption of many other supplements and medications. So if you are on any prescription medication or use other supplements, you should take the calcium at a different time, a few hours off from anything else you take.