A person's anaerobic threshold has been reached when their body is under extreme conditions and the burning of oxygen can not keep up with the body's demands.
Novak Djokovic captured his second straight Wimbledon title and the third of his career by defeating Roger Federer 7-6, 6-7, 6-4, 6-3 in Sunday's men's final at the All England Club. Djokovic is the first man to repeat as Wimbledon champion since Federer won five in a row between 2003 and 2007.
The main draw of Wimbledon 2015 begins on June 29. Novak Djokovic and Petra Kvitova are the defending men's and women's singles champions, respectively. Djokovic defeated seven-time Wimbledon champion Roger Federer 6-7, 7-4, 7-6, 5-7, 6-4 in the 2014 final, and the Serb is seeded No. 1 in this year's tournament. Kvitova is a No. 2 seed as she looks to defend her crown.