• Events

    Running

    RunningCouch to 5K5K10KHalf MarathonMarathonSee All

    Outdoor

    OutdoorCampingHikingSee All

    Triathlon

    TriathlonSprintOlympic/InternationalIRONMAN 70.3IRONMANSee All

    Cycling

    CyclingRoad CyclingCentury RidesMountain BikingSee All

    Sports

    BaseballBasketballFootballGolfMartial ArtsSoccerSoftballSwimmingTennisVolleyballWinter SportsYoga

    hidden

    active kidsactive kidsSports CampsBrowse All EventsRace Results
  • Calculators

    Calculators

    Running PaceBody Fat PercentageBody Mass Index (BMI)Ideal WeightHeart Rate
    Caloric NeedsNutritional NeedsBasal Metabolic Rate (BMR)Kids' Body Mass Index (BMI)
  • Running

    Running Events

    RunningCouch to 5K5K10KHalf MarathonMarathonSee All

    Running Articles

    RunningDistance RunningTrail RunningMud RunningTraining PlansProduct Reviews
  • Triathlon

    Triathlon Events

    TriathlonSuper SprintSprintOlympic/InternationalIRONMAN 70.3IRONMANSee All

    Cycling Events

    CyclingRoad CyclingCentury RidesMountain BikingSee All

    Triathlon Articles

    TriathlonDuathlonTraining PlansProduct Reviews

    Cycling Articles

    CyclingMountain BikingCyclo-CrossBMXTraining PlansProduct Reviews
  • Fitness

    Fitness Events

    FitnessWalkingYogaStrength TrainingPilatesWeight LiftingSee All

    Fitness Articles

    FitnessWorkoutsWalkingYogaWeight LossTraining PlansProduct Reviews
  • Sports

    Sports Events

    BaseballBasketballFootballGolfMartial ArtsSoccerSoftballSwimmingTennisVolleyballWinter Sports

    Outdoor Events

    OutdoorCampingHikingBook CampgroundSee All

    Sports Articles

    SportsSwimmingBasketballTennisBaseballSoccerSoftballVolleyballFootballLacrosseGolf

    hidden

    Water SportsIce HockeyGymnasticsMartial ArtsSkiCampingHikingTravelSailingDanceSnowshoeing
  • Nutrition

    Nutrition Articles

    NutritionMeal PrepRecipesSnacksSupplementsProduct Reviews

    Health & Injury Articles

    Health & InjuryPhysical HealthMental HealthPainInjury PreventionRecoverySleepProduct Reviews
  • Kids & Family

    Kids

    Infants (0-1)Toddlers (2-4)Big Kids (5-8)Tweens (9-12)Teens (13-18)

    Events

    SwimmingBasketballBaseballSoccerTennisVolleyballFootballMartial ArtsChildcare

    hidden

    YogaCheerleadingGymnasticsDanceMusicArts & CraftsKids FitnessSee All

    hidden

    active kidsactive kids
  1. Home
  2. >
  3. Running Articles
  4. >
  5. Ultra
Ultra Marathon Training

Featured

3 Swim Workouts for Runners

Instead of piling on the miles, incorporating swimming into your running routine can boost fitness and minimize your risk for injury. Try these thr...

By Kevin Koskella

Why Too Much Running Is Bad for Your Health

When it comes to running and other forms of vigorous exercise, more isn't always better. Rack up too many miles each week and you may actually harm...

By Elizabeth Narins, Women's Health

9 Things No One Tells You About Training for a Marathon

Running a marathon is hard, but the training can be even harder. Here's what you're not being told by seasoned veterans.

By Dorothy Beal

13 Tips for Running in Heat and Humidity

If you don't like running in the heat or humidity, you don't need to retreat inside for the next few months.

By Angela Bekkala

Latest

A Blood Test Can Change the Trajectory of Your Health

With the help of a simple blood test through InsideTracker, you can work to improve your health while still chasing your athletic goals.

By Stevie Lyn Smith MS, RDN, CSSD, CDN

The Best Gear to Keep You Cool on Hot Runs

As temperatures rise, so does the chance for chafing and sunburn. This gear will help you bypass those warm weather woes.

By Megan Harrington

ACTIVE Spring 2021 Running Shoe Guide

It's the perfect time to invest in a new pair of shoes. That's where this guide comes in handy.

By ACTIVE.com

The Best Holiday Gifts for Guys Who Run

We've gathered the hottest in new running trends and tech to make shopping this year a breeze.

By ACTIVE.com

The Best Holiday Gifts for Women Who Run

Help her not only reach her fitness goals, but look good while doing it.

By ACTIVE.com

Summer 2020 Gear Guide for Endurance Athletes

Even though typical summer activities are cancelled for the foreseeable future, safe social-distancing training swims, bike rides and runs are stil...

By ACTIVE.com

9 Ways for Runners to Get Outside Their Comfort Zone

As we ring in the new year, let's vow to mix things up.

By Michael Nystrom

10 Trail Running Essentials

By arriving equipped with the correct gear, you can go out for hours and have lots of fun.

By Emilia Benton

  • ACTIVE Logo
  • ACTIVE is the leader in online event registrations from 5k running races and marathons to softball leagues and local events. ACTIVE also makes it easy to learn and prepare for all the things you love to do with expert resources, training plans and fitness calculators.

Follow ACTIVE
  • Facebook
  • Twitter
  • Pinterest
  • Instagram
Mobile Apps
  • ACTIVE.com App
  • Couch to 5K®
  • 5K to 10K
  • Meet Mobile
  • View All Mobile Apps
Other Things To Do
  • Running Races
  • Triathlon Races
  • Cycling
  • Mountain Biking
  • 5K Races
  • 10K Races
  • More Things to Do
  • Half Marathon
  • Marathon
  • Ultra Running
  • Trail Running
  • Mud Runs
  • Swimming11
Popular on ACTIVE.com
  • San Diego
  • Los Angeles
  • New York City
  • Denver
  • Houston
  • Las Vegas
  • BMI Calculator
  • Calorie Calculator
  • 5K Training
  • Couch to 5K®
  • Half Marathon Training
  • Marathon Training
  • Organizer Technology Solutions
  • Earn Money
  • Account Access
  • Subscribe to Our Newsletter
  • Do Not Sell My Personal Information
  • About ACTIVE.com
  • Sitemap
  • Terms of Use
  • Copyright Policy
  • Your Privacy Rights
  • Privacy Settings
  • Careers
  • Support & Feedback
  • ACTIVE Access
  • Registration Software
  • Social Media Guidelines
  • Community Policies
  • Cookies Settings
  • ©2025Active Network, LLC and/or its affiliates and licensors. All rights reserved.