Exercise movement reviewed by:Cody Lockling, MS, CSCS

How Iridium Programs This

Iridium categorizes Stomach Vacuums as low-fatigue isometric volume, meaning they contribute to your core maintenance or growth targets without significantly reducing your recovery score for heavy compound lifts. To manage progression, the AI compares your hold duration against reported RPE history to determine when you have adapted enough to increase time under tension.

Form Cues

Exhale completely until your lungs feel empty
Draw your belly button deeply toward your spine
Maintain a neutral spine with your lower back flat
Take small, shallow breaths while holding the contraction

Don't

Don't hunch your shoulders up toward your ears
Don't arch your lower back off the floor
Don't perform this exercise immediately after eating
Don't hold your breath to the point of dizziness

Common Mistakes

Incomplete exhalation before starting
Flexing the abs instead of drawing them in
Arching the lower back
Training on a full stomach

Muscles Worked

This exercise primarily isolates the transverse abdominis, the deepest layer of abdominal muscle that wraps around the spine like a corset. While it doesn't build blocky muscle, strengthening this area is crucial for stabilizing the lower back and creating a tighter, flatter midsection.