• 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

Why You Should Probably Have A Shoe Rotation

There are benefits to having more than one pair of running shoes.

By Megan Harrington

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

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

ACTIVE.com Spring Tech Guide

The newest and coolest tech gadgets are here, just in time for warmer temperatures. We tell you what's worth your hard-earned dollars this spring.

By ACTIVE.com

10 Best Yoga Poses for Lower Back Pain

Suffer from chronic lower back pain? Theses poses will help you target and alleviate the pain.

By Stephanie Main 

10 Ways to Get in Shape Faster

Losing weight should always be gradual, but there are safe ways to nudge the process along. Cut time and speed up results with these tips.

By Stephanie Smith

Strength Training Guidelines for Kids of All Ages

Is strength training safe for kids? Of course it is! But as with every activity, there are guidelines to follow to ensure every kid stays safe and...

By Angela Bekkala

How Much Exercise Do You Really Need?

Turns out, there’s no need to sweat for hours on end. Learn how much exercise you really need, depending on your goals.

By Stephanie Smith

6 Killer Ab Exercises You’re Missing Out On

Want six-pack abs? Then level up from crunches and try these six tough core exercises instead.

By Doug Balzarini

The Fitness Hacks You Need in Your Life

These fun fitness hacks will change the way you think about your next workout.

By ACTIVE.com

13 Tips to Speed Up Your Metabolism

Inside your body, your very own personal trainer is working tirelessly to help you burn calories. Learn how to speed up metabolism and boost this p...

By Women's Health

  • 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.