Athletes are commonly thought to peak in their 20s. But some top sports stars are extending their careers across decadesAt this year’s US Open, when 45-year-old tennis great Venus Williams stepped on to the court to play in doubles, it was alongside a teammate who wasn’t even born when Williams won gold in the singles at the Sydney Olympics.Given that the peak performance age for a tennis player has traditionally been considered to be around the mid-20s, it was an extraordinary feat to be competing at a major, but Williams’ exceptional extension of her athletic career is increasingly common. Continue reading...