A 92-year-old woman, Li, from Hunan, China, is proving that age is just a number when it comes to fitness. Her intense morning regimen features 200 push-ups, 100 sit-ups, and even hula-hoop spins.

If fitness content seeps into your social feeds, you've likely seen something about an 11 push-up challenge. A bunch of people on TikTok and Instagram have been showing off their ability to hit this ...