I have a problem in that my left hand side seems a lot weaker than my right Several examples: I can curl less weight with my left arm I shoulder press less weight with my left shoulder When I squat, I can feel my left side giving out more If I do one-legged exercises, my left is weaker too It's not just about strength though. If I flex my left arm the bicep is nowhere near as hard as the right. It's only about 1/2 inch smaller, so it's not just a size thing. It's as if the muscle isn't activating as much and I can't tense it as hard. It also seems that the bottom part of the curl is fine but my left arm will get stuck half way whereas my right arm is fine. The other thing is about co-ordination. If I do lunges or one-legged split squats, I maintain my balance much better with right leg out in front. With left leg in front I am much more unstable. Same with one handed dumbell press - my right arm is fine and my left is wobbling about everywhere! Is this a common thing? I know that not many people have perfect symmetry, but what about muscle activation? Is there anything I can do about this? Do things like isometrics, (maximal static force) increase the innervation of the muscle? Thanks Can anyone suggest an appropriate program or adaptations I could do? More sets/less sets, more weight/less weight, more reps/less reps etc?