Spain caps off a tremendous weekend of running at the World Athletics Relays by overtaking the United States in a thrilling finish to the women's 4x400m relay in Guangzhou, China.

Nike's strategic investment in women's sports shows promise as A'ja Wilson's A'One sneaker sells out almost instantly.

After 12 yrs with Adidas, Olympian Christina Clemens' contract wasn't renewed post-baby. She reveals the unseen hurdles ...