Why Venus Williams and other sports stars are playing longer

Venus Williams has consistently broken records and barriers across a 32-year tennis career decorated by five Olympic medals, seven Grand Slam singles titles and 14 doubles Grand Slams with her sister, Serena. This month, she'll add another record and break another barrier, becoming the oldest woman to play singles at the Australian Open. At 45, Williams — handed a wildcard for the tournament — is 27 years older than the youngest player in the women's draw, fellow American Iva Jovic. By the time Jovic, 18, was born in 2007, Williams had already won four singles grand slams. The older Williams sister has said her love for the sport, rather than notions of adding to her honors list, motivate...