On TikTok, workout tips abound — some credible, some dubious. And recently, you may have been hearing about something called sprint training, which falls somewhere between 12-3-20 treadmill workouts ...

When you need an extra nudge, tie your exercise routine to someone or something. By Danielle Friedman Two years ago, Amy Gruenhut developed a near-fatal brain infection that put her into a coma for ...