As Elnaz Rekabi, the Iranian sport climber, walked out to compete at the Asian Championships in Seoul last October, she tilted her neck back and took in the wall that she would have to surmount to progress in the event. Climbing is a vertical obstacle race, with indentions and swells and no easy grips or footholds. As Rekabi, 33, gazed at the wall, one could sense she was mentally mapping out her climb.