Ready for some Friday R&R? Catch up on the latest and Greatist in fitness, health, and happiness with our weekly roundup of our most popular articles this week:

Photo by Marissa Angell

Are You a Narcissist?

Some psychologists say the current generation of 18- to 22-year-olds is the most narcissistic in history. But maybe a little self-obsession isn’t such a bad thing.

It’s Greatist’s Birthday!

It’s Greatist’s birthday! What better choices have we helped you make this year?

Live Like a Pro: Mountain Biker Catharine Pendrel

Current Mountain Biking World Champ and 2012 Olympic hopeful Catharine Pendrel is making all the right moves — at super-fast speed. Read on for her expert tips on nutrition, training, and staying fit on-the-go.