I've been getting this twitch in my left bicep
during my workout. It's an uneasy feeling, like I'm about to pull a muscle or something. This usually happens during flies or pull-downs. Afterwards, my left arm feels very tense, and my bicep has a bit of discomfort. Well nothing has happened yet, but I'm concern I might injure myself and not be able to workout. Is this due to my left arm being weaker than my right?