Multiple race warmup and cool downs, managing hydration and caloric intake, moving at her max sprinting speed — more than once. It’s not often that American Liz Stephen feels the lingering effects of a World Cup sprint day. Her most recent memory was three years ago, when she qualified 22nd in Szklarska Poreba, Poland. But this weekend’s three-day competition series in PyeongChang, South Korea, challenged the distance specialist once again. With a smaller World Cup...