I have been lifting for almost a year now. It seems that my left side is becoming weaker when I do DB exercises. I've not had any injuries and feel no pain during my sets. My arm just flat gives out. I started a set of lateral raises with 15lb dumbells. I was doing both arms at the same time and at rep 9, I just couldn't get my left one to budge. I dropped it down to 12.5 lbs just for that side and finished out the set. My following two sets were similiar.
What is the best way to remedy this? Should I just train my left arm at a lighter weight? Is it okay to drop lbs in the middle of a set? Do both arms/sides have to be worked with the same amount of weight?
What is the best way to remedy this? Should I just train my left arm at a lighter weight? Is it okay to drop lbs in the middle of a set? Do both arms/sides have to be worked with the same amount of weight?

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