• 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

Beyond the Turkey Trot: How to Stay Motivated to Run During the Holidays

Shorter days, winter weather, travel, and holiday obligations can disrupt even a consistent running routine. These six practical strategies can hel...

By Rashelle Brown

The Training Metrics Your Watch Can't Measure

Your watch can track pace, heart rate, sleep, and estimated recovery, but it cannot understand everything affecting your training. Learn how percei...

By Lori Russell

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

Rossignol 2026 Fall Shoe Guide

Rossignol may be better known for its mountain heritage, but the Venosk makes a compelling case for the brand on the trail. Lightweight, comfortabl...

By Stephen Gendreau

Latest

Improve Your Relationship With Exercise

The benefits of exercise are endless. But, did you know that working out can boost your relationship with friends, family and partners? Learn why a...

By Madeline Romeo

A Look at Physical Fitness in America

The executive director of the President's Council on Fitness, Sports, and Nutrition urges you to help America's youth get moving.

By Giselle Domdom

4 Tips to Protect Your Knees

Stay active and maintain healthy knees through strength training, flexibility and a little TLC.

By Judi Sheppard Missett

Are Dog Owners Healthier People?

According to research, owning a dog may be healthier for you than that big salad you just ate.

By Talia Marcheggiani

Music for Yoga: Songs to Match Your Practice

Sometimes it isn't easy to follow through with your yoga practice at home—but there is one simple remedy: music. Here are some unusual artist...

By Christina Scannapiego

Common Hot Yoga Myths (and Truths)

Common hot yoga myths, debunked.

By Christina Scannapiego

Lose Weight With This 20-Minute Insanity Workout

Drop serious pounds and sculpt sexy curves with Insanity, the DVD craze that lives up to the hype.

By SELF Editors

3 Tips to Improve Your Posture

Your posture is critical to both your health and your running form. Use these tips to make it better.

By Danny Dreyer, Creator and Founder of Chi Running

  • 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.