• 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

The Habits That Make the Runner: How to Build a Year of Running Success in 2026

Motivation fades, but habits last. Learn how small, consistent routines—not willpower—lead to real running progress, and how to build a training sy...

By Marc Lindsay

Trends To Run With In 2026

New year, new miles, new trends. From trading pavement for gravel and turning lunch breaks into running opportunities, 2026 is shaping up to be a s...

By Lori Russell

How To Treat And Prevent Shin Splints

Shin splints are a common overuse injury that runners experience, but they are not a life sentence or a sign that running is not for you.

By Kristina Duffy

The Essential Winter Running Gear Guide: What You Actually Need (and What You Don’t)

You don’t need a pile of expensive gear to run through winter—just a few reliable pieces that work. This guide covers winter essentials, what to sk...

By Marc Lindsay

Latest

Squats 101: How Low Should You Go?

Squats can have an enormous impact on your personal goals and progress in the weight room. How do you do them?

By Jake Bernards

10 Things Only Girls Who Lift Understand

You may not want to admit it, ladies, but there's a very good chance you've done at least a few of these.

By Women's Health

The Importance of Rest in a Workout Program

Taking a day off from exercise can be hard for fitness junkies, but when it comes to recovery and injury prevention.

By Ashley Lauretta

Full-Body Resistance Band Workout

There are plenty of equipment options at your local gym, but have you tried the resistance band yet?

By Doug Balzarini, CSCS, MMA-CC

5 Ways to Strengthen Weak Ankles

These 5 simple, effective exercises will keep your ankles happy

By Prevention

Full-Body CrossFit Circuit Workout

This CrossFit-style circuit targets your entire body and spikes your heart rate for an effective and fast workout on the go

A Weekend with Kathryn Budig

ACTIVE.com editor Taylor Danser spent three days of yoga workshops with expert teacher Kathryn Budig. It left her sore, informed and inspired.

By Taylor Danser

How To Build Knee Strength and Improve Performance

We put a lot of pressure on our knees in our everyday lives. Strengthen them with these exercises.

By Ashley Lauretta

  • 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.