Mieko Nagaoka probably deserves to sleep in on Monday morning.
Over the weekend, the Japanese woman -- who is variously listed as 100 or 101 years old -- became the first centenarian to complete a 1,500-meter race in a 25-meter pool.
Nagaoka swam the 30 lengths in just over 1 hour and 15 minutes.
"I feel relieved that I could complete swimming 1,500 meters," she told CNN through her son. "But I will still continue swimming ahead."