Great behind-the-scenes look at Meb Keflezighi's training ahead of the 2014 New York City Marathon.

Grumpy cat's viral replacement has nothing on this new marathoner!

According to Australia's Ultra 168, these are the 25 most influential ultra runners. You probably haven't heard of most of them, but you'll know 'em after reading this.

12% of the general population (18+ years old) have participated in an "endurance sport" (a half-marathon or longer), and participants are 1.3 times more likely to be single.

The Verge's Kwame Opam reports on Apple's new M8 chip, and its ability to distinguish between running and cycling for health tracking.

"Fortunately, the ever-expanding fitness community has countless drinks and electrolyte mixes for all your hydration needs. From Gatorade to a speciality beverage designed just for women, this Guide to Hydration is sure to have the liquid replenishment that’s right for you."

Talk about motivation! WTF have you done lately? (And who'd you do it for?)

Flat feet— the complete or near-total lack of an arch— was once thought to be enough to prohibit people from running (or even joining the military). But fortunately for us flat-footed Pheidippides, running shoes have evolved (even if our feet haven’t).

Hundreds of runners are gearing up for a four-week, coast-to-coast relay race to honor three people killed in the Boston Marathon bombings and raise money for 260 people wounded when twin explosions went off near the finish line of the world's oldest marathon. Organizers are pushing to raise $1 million from this year's One Run for Boston, which is scheduled to finish a week before the storied Boston Marathon and two days before the anniversary of the explosions. The money will go to The One Fund, a charity established to help those who were injured or significantly affected by the bombings.

The nonprofit group formed following the Boston Marathon bombings last April, One Fund Boston, has collected more than $12 million as donors continue to contribute to help victims of the incident. The Boston Globe reports that in the first three months the fund collected and dispersed $61 million in donation. More than 230 people who were injured or relatives of those who died have recieved the funds. Yet donations have continued to come in and the charity is looking at new ways to dispurse the funds.