Tight hip flexors, especially a deep muscle called the psoas, can silently stress your spine. Here's why this muscle deserves more attention—and how to strengthen it. Lower back pain is often ...

She challenged host Ryan Seacrest to a plank-off. Becky Lenski, a fitness instructor from Yorkville, Illinois, took home $73,000 and a trip to Costa Rica on the April 16 episode of the game show.