Yumilka Daysi RuÃÂz Luaces (born 8 May 1978) is a Cuban retired volleyball player who represented her native country in four consecutive Summer Olympics, starting in 1996. She won Olympic gold medals with the national team in 1996 and 2000. She also claimed the bronze at the 2004 Olympics. As an outside hitter, she was integral to the dominance of the Cuban team in the late 1990s and early 2000s.
In 2023, RuÃÂz was inducted into the International Volleyball Hall of Fame.
RuÃÂz played the 2004âÂÂ05 season with the Russian club Uralochka-NTMK, where she set the record of scoring 53 points in a single match and led her team to the championship title.
RuÃÂz retired in 2008 at age 30. At , she had a jump reach of at the peak of her career.
After three years of inactivity, RuÃÂz made a comeback in 2012 to play in Russian League for Uralochka-NTMK Ekaterinburg, and participated in the European Champions League. She retired in 2014.
In August 2008, RuÃÂz was elected to an eight-year term to the Athletes' Commission of the International Olympic Committee by athletes that cast votes.