A 77-year-old man from northeastern China stays fit by working out in freezing cold temperature.
Gao Yinyu jogs and maneuvers himself on parallel bars just like a gymnast. Then he takes a dip in a lake. He does all this in -25 degree Celsius weather (-13 degrees Fahrenheit) wearing only his underwear.
According to reports, Yinyu has been exercising using this routine for 10 years, but has never gotten sick.