I'm not saying this to you argue or disagree with you at all but just one thing I want to point out is that when you are doing your back exercises it was likely engaging your finger, forearm, and other muscles used for typing and so strengthening those is what might have helped even more than strengthening your back itself
I'm not saying this to you argue or disagree with you at all but just one thing I want to point out is that when you are doing your back exercises it was likely engaging your finger, forearm, and other muscles used for typing and so strengthening those is what might have helped even more than strengthening your back itself