Fans are speculating about John Cena's health after viral clips appeared to show the retired WWE champion struggling with his posture and mobility.

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. If you’ve been trying ...

Although I have always been tall, I have never been known for my posture. As early as middle school, one of my basketball and volleyball coaches began regularly correcting my posture. She would poke ...