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Why You Need to See Selena Gomez's New Tattoo

There's an important message behind it.

First Woman to Officially Run the Boston Marathon Runs the Race 50 Years Later

And she's wearing the same number an official tried to rip off her in 1967.

The Do-Anywhere Tabata Workout You Can Crush In 4 Minutes Flat

Room to jump? Good--that's all you need to break a sweat in four fast minutes

5 Reasons Why Running in Cold Weather is Good for You

Experts say you should skip the treadmill this winter. Find out why!

Hate Running? 25 Ways to Learn to Love It

Some of our favorite running bloggers and coaches share their best tips for finding fun on the run (really!).

Is Hotter Always Better?

When it comes to fitness, many exercise studios are turning up the heat--literally. Here, the real deal on hot workout classes.

How to Crush Swimming Workouts Like You're Michael Phelps

There's a reason swimming is the queen of cardio--jump in!

Walk Off the Weight!

Turn an afternoon stroll into a serious sweat session with this 30-minute plan.

"Running Helped Me Overcome Depression and Anxiety"

A good run helps this women cope with her problems.

Best New Fitness Trackers

New bands are constantly hitting the market. Which ones are worth your cash?

The Interval Training Routine That Will Train Your Core

Burn calories and strengthen your abs with this equipment-free workout.

What Running a Marathon Really Does to Your Body

From your brain to the bottom of your feet, this handy infographic details what you're signing your body up for when you run a race.

5 Beginner Running Injuries, Plus How to Dodge 'Em

Don't wait for an injury to sideline you. Avoid (or treat) these common discomforts that plague new runners.

Find a Great Running Route Anywhere

5 ways to fit in a run wherever life takes you.

8 Cardio Workouts That Burn 300+ Calories in 30 Minutes

Tired of the "dreadmill"? Try these 8 calorie-blasting cardio workouts this winter (and beyond) to burn up to 600 calories in just 30 minutes.

Hit the Sand! 5 Essential Beach Running Tips

Yes, it's harder than on the pavement--but that just means your calves will look even better afterwards.

26 Race Signs to Keep You Motivated for 26(.2) Miles

Studies show that positive messages can help you run faster--these signs from marathons around the country prove it.

What's the Best Temperature for a Run?

Whether you're running a mile or a half marathon, this handy infographic can help get you there.

These Pro Tips Will Change How You Feel About the Treadmill

Try these tricks to reenergize your strides.

8 Classes That Don't Feel like Exercise

Sick of the treadmill? Get fit with these high-intensity alternatives!

Alternative Cardio Workout

Your favorite toning tool is about to blow your mind (and burn mega calories)!

10-Minute Cardio Workout

Torch fat and sculpt your abs with these 5 multitasking moves.

Get Results Fast With This Tabata Workout

Work every inch or your body and blast fat with only two workouts a week.

30 Thoughts You Have in Spin Class

On the outside? You're a smiling, glowing, spinning champ. On the inside? Things are a little different.