There’s a temptation, especially at the start, to rotate through as many ab exercises as possible — thinking variety equals progress. It usually doesn’t. The abs respond to the same training logic as every other muscle: consistent mechanical tension, progressive overload, and enough recovery. You don’t need a dozen exercises. You need the right two.
ATHLEAN-X has been making this argument for years, and the underlying biomechanics back it up. The rectus abdominis primarily performs spinal flexion and posterior pelvic tilt. The obliques manage rotation and lateral flexion. Exercises that don’t demand both of those things tend to shortchange the muscle.
The Problem With Most Popular Ab Exercises
Crunches done with the feet anchored recruit far more hip flexor than ab. Planks are a great anti-extension exercise but provide almost no dynamic tension on the rectus abdominis. Sit-ups have the same hip flexor problem as crunches — potentially worse, since the range of motion is larger.
None of these are completely without value. But treating them as your primary ab builders will leave you disappointed. The exercises that actually develop the abs take the muscle through its full functional range under load.
Ab Wheel Rollouts: Full Extension, Full Tension
The ab wheel rollout is one of the most demanding ab exercises you can do without equipment. Rolling out forces the abs to resist lumbar extension — they have to work extremely hard to prevent your lower back from collapsing. Rolling back in requires the abs to generate force to flex the spine.
Most people start by rolling out too far and using momentum to come back. The form cue that matters: keep your lower back flat throughout the movement, and control both phases. If you can’t complete the rollout without your lower back caving in, shorten the range of motion and build from there.
As a beginner, start from the knees. Progress to standing rollouts over time — they’re one of the hardest bodyweight movements you can do.
Cable Crunches: Load the Muscle Directly
The cable crunch shows up repeatedly in ab training research because it checks the right boxes: it takes the abs through a full range of motion, it’s easy to load progressively, and it keeps tension on the muscle throughout the movement.
Set the cable above head height, kneel, hold the rope behind your head, and curl your ribcage toward your pelvis. Your hips should stay stationary — the movement comes entirely from spinal flexion. A slow, controlled contraction at the bottom is where the work happens.
Start light. Most people are surprised how little weight they need to feel this properly. Once you’ve got the pattern down, add weight each week the same way you would with any other lift.
How to Program Them
Two to three sets of each exercise, two to three times per week, is enough for most people. Give your abs 48 hours between sessions. They recover relatively quickly, but they still need time to repair and grow after loaded work.
Within a few months of consistent, progressive training with these two movements, you’ll notice more thickness and definition in your midsection — regardless of what the scale says.
The video below goes deeper into the biomechanics behind each exercise and shows the exact form cues that separate the effective version from the common mistake everyone makes.
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