I first met Sarah Abrams in America when I was 18 and she was 19. She was the roommate of a teammate of mine at Harvard. Sarah was a long-jumper on the ‘Track’ team, as it’s called in the U.S. When you meet Sarah you can immediately tell she’s a performance athlete. First, there’s her height. While that might be the most obvious giveaway, there are several other telltale clues. She is at once...