• 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

Brooks Glycerin Max 2: Max Cushion, Max Comfort, and (Mostly) Max Enjoyment

The Brooks Glycerin Max 2 arrives with huge expectations, especially for runners who fell hard for the original iteration.

By Elizabeth Grimsley

Unboxing the Future of Foot Recovery: A Hyperboot Holiday Review

Is the Hyperice Hyperboot worth it? Our review covers the features, benefits, and holiday sale details for this high-tech recovery footwear.

By Stephen Gendreau

Reebok Launches Nano X5 Edge Training Shoes

The Official Shoe of Fitness Just Leveled Up

These Magical Leg Sleeves Are My New Favorite Recovery Tool

An honest review of the Hyperice Normatec Elite. Learn about its features, benefits, and why it's a game-changer for recovery, plus details on the ...

By Stephen Gendreau

Latest

9 Ways to Be a Healthier Couple

Staying motivated to be healthy and fit can be hard when you’re with someone who loves you no matter what—and never denies you pizza.

By Nikki Chavanelle

Why You Should Try a HIIT Workout

High-intensity interval training or HIIT workouts deliver major results in half the time, so you don't have to spend endless hours in the gym.

By Jake Bernards

7 Ways to Relieve Neck and Shoulder Tension

If you carry your stress in your neck and shoulders, we’ve got the perfect exercises to relieve your tension—no massage therapist required.

By Stephanie Main 

7 Gym Bag Essentials You’re Missing

No matter their sport, every gym-goer needs these seven easy to miss items in their workout bag.

By Stephanie Smith

The Importance of Building Grip Strength

Learn the importance of getting a grip—literally—and how strengthening your squeeze can improve your life.

By Stephanie Smith

8 Bodyweight Stair Workouts

Get an effective workout in using only a staircase and your own bodyweight.

By Doug Balzarini, CSCS, MMA-CC

7 Yoga Poses to Fight Afternoon Fatigue

Afternoon fatigue can plummet your productivity and dampen your mood, but with these yoga poses, you can continue to seize the day.

By Stephanie Main 

How to Gain Muscle for Beginners

Creating an effective weight-training program may seem intimidating at first, but these tips for beginners will show you how.

By Jake Bernards

  • 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.