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What It's Like to Run One of the Hardest Races on the Planet
This mountain race makes a marathon look like a cakewalk.
How Two Trainers Overcame Their Self-Doubt to Run Their First Half Marathon
Even your favorite trainers have their weaknesses.
How Jen Widerstrom Talks Herself Through a Tough Workout
And how she takes it from "I don't want to be here," to "CRUSHED IT."
I Lost My Leg In the Boston Marathon Bombing and I Appreciate My Body More Than Ever
I'm going to do everything on one leg I never did on two—including a triathlon!
The 5 Biggest Fitness Influencers In the World for 2017
~The Internet has spoken~
Nikki Bella Gets Her Killer Booty from Barre Workouts and Milkshakes with John Cena
Nikki Bella chats about booty workouts, Jennifer Lopez, and her recent engagement.
An Open Letter to Women Who Are Afraid of the Weight Room
Are you really going to let a little iron intimidate you? Didn't think so.
The 1-Second Trick That Will Help You Ace Every Workout
It works for badass rock climber Sasha DiGiulian at 1K feet
10 Strong, Powerful Women to Inspire Your Inner Badass
~ All the feels ~
Why You Should Stop Doing Things You Hate Once and for All
Life is too damn short—and you're not doing your health goals any favors either.
Watch Former WNBA Player Tamika Catchings' Inspiring Life Story
Tamika Catchings didn't even blink at any obstacle that came her way.
How Jen Widerstrom from 'The Biggest Loser' Crushes Her Goals
If anyone can get you to stick to your resolution, it's this girl
The Workout Excuse the Tone It Up Girls Want You to Stop Making
The most common resolution set-back Karena and Katrina hear from their TIU community—and how to overcome it.
How to Boost Your Mood On Blue Monday
Don't let the so-called "most depressing day of the year" get you down. Time to show Monday bum-day who's boss.
These Motivational Trainer Mantras Will Inspire You to Be Your Personal Best
Your New Year's motivation is about to reach new heights.
The Tips You Need to Boost Your Fitness and Conquer Any Workout Challenge
Ace your race, nail a pull-up, or check off that body goal—this is your ultimate guide
How to Use Visualization to Achieve All of Your Goals This Year
More results with less time at the gym.
How Ronda Rousey Is Training for the Biggest Fight of Her Life
Your body will hurt just reading her training plan.
Why Caffeine Is the Best Thing That's Ever Happened to Your Workout
Caffeine can up your exercise game
How Lea Michele Stays Motivated During Her Workout
You've probably done the same before.
This New Instagram Feature Will Motivate You to Stick with Your New Year's Resolutions
Group Fitness Not Your Thing? This Might Explain Why
Those super-popular classes aren't for everyone, and that's totally OK.
This Woman Just Made History Running 775 Miles Through the Desert
Maybe you should go for a run this weekend.
Aly Raisman On What It's Like to Compete In a Sport That's All About Perfection
Because there's no such thing as a perfect 10.
This Video Will Inspire You to Own Your #BellyJelly
Join the #BellyJelly movement