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Most people have asymmetrical bodies and one dominant side. Doing a heavy single-arm kettlebell carry is one of the fastest ways I’ve found to fix posture. People constantly ask me the quickest way to stand up straighter. This is it. Carrying the weight off-center forces your shoulders back and lights up your entire back chain. This exercise fixed my core imbalance specifically. I used to have one oblique noticeably stronger than the other. Now they’re even, and my mind-muscle connection is way better. Do this 3x a week until your grip gives out. Give it a month.