The bar felt cold and unforgiving against my palms. My arms shook, my core trembled, and my chin barely scraped the floor. "Just one more rep," my trainer barked, his voice a distant echo in the din of the gym. I gritted my teeth, squeezing every ounce of strength from my weary muscles, and pulled myself up. One agonizing rep. It wasn't a pull-up, not yet. It was a desperate struggle, a barely-there inverted row. That was 8 years ago. The sight of...