• 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. Fitness Articles
  4. >
  5. Core Ab Training
Core Training

Featured

My Experience with AlterMe DNA Health & Fitness DNA Report

Discover how AlterMe’s DNA report provides personalized health & fitness insights, secure data handling, & expert guidance. Learn more about your b...

By Stephen Gendreau

I Spent 60 Days Wearing The UltraHuman Ring Air – Here’s What I Think

Are you curious about the UltraHuman Ring Air? It's a minimalist, high-tech health tracker that delivers real insights. Here's my honest review aft...

By Stephen Gendreau

How Runners Can Benefit From The New KT Soothe Line For Pain Relief And Muscle Recovery

Discover KT's Soothe Line, which contains lavender and magnesium for pain relief and muscle recovery. It is perfect for runners. Visit now and rule...

What is Tabata Training?

Short on time or need a change of pace? Learn what tabata training is and how you can get a butt-blasting workout done in four minutes.

By Fara Rosenzweig

Latest

Sculpt Your Upper-Body With a Bosu Ball

<a href="http://www.fitnessquest10.com/">Fitness Quest 10</a> owner Todd Durkin shares three exercises to strengthen your upper body and sculpt you...

How to Listen to Your Body at the Gym

We've all heard the saying, but what does it really meant to listen to your body at the gym?

By Greatist.com

Strength-Training Exercises for Teens

Before a teen starts performing complex workouts and lifting heavy weights, it's important they master these simple exercises.

By George Kalantzis

5 Health Benefits of Yoga

Yoga can increase your quality of life in many ways. Have you jumped on the bandwagon yet?

By Vitacost

Foam Rolling Exercises Everyone Should Do

Getting a professional massage everyday would be great, but it's an unrealistic wish for most of us. Try using a foam roller instead.

By Hunter Hewitt

Is It Safe to Work Out Twice a Day?

Is working out twice a day safe? Find out what some experts have to say.

By Greatist.com

4 Butt-Kicking Boot Camps in California

Creative Ways to Support Breast Cancer

There are more ways to stand up to breast cancer than just wearing pink. From specialty products and clothing to auctions and events, these compani...

By Fara Rosenzweig

  • 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
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
  • Swimming
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
  • Privacy Notice
  • 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.