The British track Olympian Beth Potter switched sports, but her stardom in triathlon came too late to qualify for Tokyo. Then she set a world record in a 5K that won’t count. What’s a world-class athlete to do?

The British track Olympian Beth Potter switched sports, but her stardom in triathlon came too late to qualify for Tokyo. Then she set a world record in a 5K that won’t count. What’s a world-class athlete to do?