As you train, two things happen to improve your muscles' ability to use oxygen. First, your heart gets stronger and delivers more oxygen; and second, your leg muscles get better at using the oxygen.

If I get good at reading hit books first, I'll end up paying close to nothing but be rewarded for my good taste and ability to sneeze ideas.

She’s confident in her ability — she beat Hingis at last year’s German Open — but said she knows her game needs the seasoning she can get by advancing to finals.