Building visible abs requires more than endless crunches and planks.
In a recent discussion, fitness experts Jeff Nippard and Dr. Mike Israetel broke down their favorite core exercises for actually growing abdominal muscles—not just strengthening them.
Their insights challenge conventional wisdom about training abs and reveal why most people never see the six-pack development they’re after.
The conversation centered on full range of motion movements, progressive overload, and avoiding common mistakes that sabotage results.
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Full Range of Motion: The Missing Ingredient
Dr. Mike Israetel emphasized that direct training with full range of motion is essential for developing defined abs.
His top choice? Weighted sit-ups on either a decline bench or GHD (glute-ham developer) machine.
One of my favorite exercises to do for this is some form of situp whether it’s a decline bench sit up or a GHD situp because it gets extension so stretching through your abs which is great for a muscle building stimulus but then you’re also coming in and getting that full range of motion to train the rectus abdominis.
This approach provides stretch-mediated hypertrophy—a powerful stimulus for muscle growth that static exercises can’t deliver.
The ability to add weight makes these movements even more effective for progressive overload.
Why Adding Weight Matters
Israetel pointed out that abs shouldn’t be treated differently than other muscles.
Holding a dumbbell or plate during sit-ups creates additional leverage and challenge. This progressive resistance is what triggers muscle growth over time.
For some reason people put the abs as an exercise that requires no additional weight you just have to do high reps beyond the recommended 30 for hypertrophy absolutely no modicum of effort relative to failure you’re not tracking it in any way at all.
Training abs with high reps and zero weight is a recipe for stagnation.
Cable Crunches: Jeff Nippard’s Go-To Movement
Nippard shared his preference for cable crunches, along with an honest admission about his training evolution.
This is an area that I will fully admit that I even said publicly I had bad ab genetics for uh turns out I just wasn’t really training them.
His experience highlights a common misconception: blaming genetics when the real issue is insufficient direct training stimulus.
After incorporating weighted sit-ups and cable crunches with proper technique, Nippard saw significant improvements.
The Hip Flexor Problem
Coming from a distance running background, Nippard developed particularly strong hip flexors.
This created an unexpected challenge during ab training—his hip flexors would dominate movements, reducing tension on the abdominals themselves.
When you’re doing cable crunches you can use the hip flexors very actively right and so it’s another aspect of oh you have a strong point it takes away from what you’re trying to train the weak point.
Keeping hips fixed and focusing tension entirely in the torso became essential for maximizing abdominal engagement.
Critical Technique Cue for Better Isolation
Israetel shared a game-changing cue for preventing hip flexor dominance during ab exercises.
A really helpful abs cue is trying to bring your breastplate zyphoid process to your pubic symphysis so towards your groin trying to close the space and just flex every spinus process down into a real spinal crunch.
This visualization emphasizes spinal flexion rather than hip flexion.
Instead of hinging at the hips, practitioners should focus on curling the spine segment by segment, bringing ribs toward pelvis.
Why Isometric Exercises Fall Short for Growth
Both experts acknowledged that exercises like planks have their place—particularly for anti-extension and anti-rotation stability.
However, isometric holds simply don’t provide the muscle-building stimulus that dynamic, loaded movements deliver.
As a muscle builder you want full range you want load you want effort and you want a frequency of a few times per week so that you’re able to actually stimulate and grow.
Planks build endurance and stability. Weighted sit-ups and cable crunches build visible muscle mass.
The Complete Formula for Ab Development
Based on this expert discussion, effective ab training requires four key elements:
- Full range of motion: Exercises that allow complete stretching and contraction of abdominal muscles
- Progressive overload: Adding weight over time to continuously challenge muscles
- Proximity to failure: Training with genuine effort, not just going through motions
- Adequate frequency: Training abs multiple times per week for optimal growth stimulus
Machine crunches also earned recognition as an effective option for keeping hips fixed while maximizing abdominal tension.
What to Stop Doing Immediately
According to Israetel, common mistakes that prevent ab development include:
- Performing endless high-rep sets without weight
- Training far from muscular failure
- Failing to track progression
- Relying exclusively on isometric exercises
Abs respond to training stimuli just like every other muscle group. They require progressive tension, mechanical load, and metabolic stress to grow.
Practical Implementation Strategy
For those looking to apply these principles, start with 2-3 direct ab training sessions weekly.
Choose one or two primary movements—weighted decline sit-ups, GHD sit-ups, cable crunches, or machine crunches.
Perform 3-4 sets of 8-15 repetitions, adding weight when you can complete all sets at the top of that range. Focus intensely on spinal flexion rather than hip movement.
Track your performance just as diligently as you would for squats or bench press.
Remember: genetics may influence where your abs insert and how they’re shaped, but insufficient training—not poor genetics—is usually the culprit behind underdeveloped core musculature.
