BYDGOSZCZ, POLAND - JULY 21: Joy McArthur from USA competes in women's hammer throw qualification during the IAAF World U20 Championships at the Zawisza Stadium on July 21, 2016 in Bydgoszcz, Poland. (Photo by Adam Nurkiewicz/Getty Images for IAAF)
BYDGOSZCZ, POLAND - JULY 21: Joy McArthur from USA competes in women's hammer throw qualification during the IAAF World U20 Championships at the Zawisza Stadium on July 21, 2016 in Bydgoszcz, Poland. (Photo by Adam Nurkiewicz/Getty Images for IAAF)