This hub groups exercises by the core muscles they train: the rectus abdominis, the obliques, and the deep stabilizers. It is the muscle-group view of trunk training. For the same work organized by what the trunk is doing (anti-extension, anti-rotation, flexion), see the Core movement hub. Two or three of these per session is plenty alongside your bigger lifts.
Below are 41 ab and core exercises, 7 of them beginner-friendly, ordered from easiest to most advanced. Each one comes with a full form guide.
From Domenic: Two or three core exercises a session is plenty. It recovers slower than people think, especially since it's already working on every other lift.
Related Exercise Hubs
All Ab and Core Exercises (41)

Bicycle Crunch

Bird Dog

Crunch

Crunch Partial

Deadbug Partial

Forearm Plank

Heel Tap

Cross Toe Touch

Deadbug

Hand Plank

High Knee-N-Crunch

Hollow Hold

Hundred

Leg Raise

March-N-Chop

Plank Jacks

Reach Up

Seated Side Bend

Standing Twist

Twist Crunch

Bird Dogs Crunch

Boat Pose

Floor Wiper

Hanging Leg Raises

In-N-Out

Mountain Climber

Plank Twist

Plank Walk

Plank-N-Twist

Renegade Row

Reverse Crunch

Russian Twist

Scissor Raise

Side Plank

Side Plank Raise

Side Plank Reach Through

Spider Plank

Squat Twist

Star Crunches

Teaser Hold

Walk Out
Frequently Asked Questions
What are the best core exercises for beginners?
Bicycle Crunch, Bird Dog, and Crunch are the most beginner-friendly choices here. Start with whichever one you can perform with clean form for every rep, then build from there.
How many sets and reps should I do for core exercises?
A practical default is 2 to 4 sets of 8 to 15 reps, 2 sessions per week, with at least 48 hours before training the same muscles again. That is broadly in line with ACSM resistance-training guidance for general fitness. Start at the easier end of that range and add sets or reps before adding new exercises; each exercise's guide gives specific targets.
How often should I train core?
Two sessions a week, with at least a day of recovery between them, works for most muscle groups. Pick two or three exercises (Bicycle Crunch and Bird Dog, for example) and progress them gradually rather than piling on all the volume at once.
How do I make these core exercises harder over time?
Once your form is repeatable, progress toward harder options such as Bird Dogs Crunch and Boat Pose. Each exercise's guide lists its regressions and progressions in order, so there is always a clear next step.