Home Abs Exercises - FIXED: Planks and Rollouts
Summary
Jeff Cavaliere explains how to dramatically improve the effectiveness of two popular ab exercises — the plank and the ab rollout — by deactivating the hip flexors and engaging the glutes and adductors. The core principle is that when the hip flexors dominate these movements, the abs are unable to do their full share of the work. Small adjustments in muscle activation lead to significantly higher quality reps.
Key Points
- Hip flexors are the main problem in stability-based ab exercises. When they activate, they compensate for the abs, reducing overall abdominal engagement.
- Squeezing the glutes during both the plank and the ab rollout inhibits the hip flexors through reciprocal inhibition, forcing the abs to take over.
- Pressing toes into the ground during a plank unintentionally activates the hip flexors, which act as a counterforce — this undermines ab activation.
- Squeezing the legs together to engage the adductors provides a stable base, compounding the benefit (as previously demonstrated with hanging ab exercises).
- During the ab rollout, the most common mistake is allowing the hips to flex first on the return, which hands the movement back to the hip flexors instead of the abs.
- Rep quality matters far more than rep quantity. Performing 100 sloppy rollouts is less effective than a smaller number of properly executed reps.
- At the top of the rollout, additional spinal flexion can be added to further intensify ab contraction once proper mechanics are established.
Exercise Details
Plank
- Target Muscles: Rectus abdominis, transverse abdominis, glutes, adductors
- Proper Form Cues:
- Squeeze glutes firmly throughout the entire hold
- Bring heels together and squeeze legs to activate the adductors
- Avoid raising the hips or digging toes aggressively into the ground
- Maintain a neutral, braced position with abs — not hip flexors — providing stability
- Common Mistakes to Avoid:
- Allowing hips to sag or pike upward
- Relying on toe-drive into the floor, which triggers hip flexor dominance
- Ignoring what the lower body is doing entirely
Ab Rollout (Ab Roller)
- Target Muscles: Rectus abdominis, transverse abdominis, glutes
- Proper Form Cues:
- At full extension, squeeze the glutes before initiating the return
- Pull the body back as one unit — hips, torso, and arms moving together
- At the top of the movement, add a deliberate spinal flexion to maximize ab contraction
- Common Mistakes to Avoid:
- Allowing the hips to flex first on the return (the most common error)
- Counting reps without monitoring movement quality
- Prioritizing range of motion or rep volume over proper muscle sequencing
- Sets/Reps: No specific numbers given; emphasis is placed on quality over quantity