• 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)
  • Challenges
  • 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

How to Stay Hydrated While Cycling

Drinking on the bike is a legal performance enhancement

By Greg Kaplan

How to Help Kids Build a Lifelong Love of Movement

How do you raise kids who actually want to stay active? Discover six practical ways to make movement fun, build confidence, encourage exploration, ...

By Kristina Duffy

Innodigym Omni X1 Pro Review: Is This Smart Home Gym Worth It?

The Innodigym Omni X1 Pro packs digital resistance, guided workouts, and an extensive exercise library into a compact smart home gym. After three w...

By Kristina Duffy

Garmin Venu 4 vs. vívoactive 6: Which Watch Is Better for Women?

The Garmin Venu 4 packs in more health, training, and smartwatch features, but the lighter and less expensive vívoactive 6 gets a lot right. We com...

By Stephen Gendreau

Latest

Strawberry Banana Recovery Ice Cream

Replenish post-workout with this fruity Ninja Creami packed with protein, potassium, and natural carbs for recovery.

By Stephen Gendreau

Introducing the Salomon Aero Blaze 3

For runners who seek the ideal balance of comfort, responsiveness, and durability, the Salomon Aero Blaze 3 has arrived as your ultimate road partner.

By Stephen Gendreau

Eddie Ryan on the Mountain Magic Behind XTERRA’s New Championship Home

A lifelong champion for mountain communities and the power of sport to spark growth, Eddie Ryan opens up on how and why XTERRA’s biggest stage is c...

By Brittany Vermeer    

HOKA and MAAP Announce Limited-Edition Collaboration

Uniting Running and Cycling in a Street-Ready Release

Meet Merrell's ProMorph - The Road-to-Trail Revolution

Merrell's ProMorph road-to-trail shoe. Explore design features and performance benefits for versatile athletes.

By Stephen Gendreau

Nordic Walking - Your Complete Guide to This Low-Impact Sport

Discover Nordic walking benefits, proper technique, and equipment tips. This complete guide helps beginners start this low-impact, full-body exercise.

By Stephen Gendreau

How To Increase Your Mileage Without Getting Hurt

How to safely increase your running mileage. Tips from our expert!

By Megan Harrington

Skechers Aero Burst Running Shoes Review

Discover the comfort, performance, and value of Skechers Aero Burst running shoes. Perfect for casual runners who value lightweight design and affo...

By Stephen Gendreau

  • 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
  • Advertise With Us
  • Registration Software
  • Social Media Guidelines
  • Community Policies
  • Cookies Settings
  • ©2026Active Network, LLC and/or its affiliates and licensors. All rights reserved.