ISO Holds for Muscle Control
Build stage-ready muscle control with breath-locked isometric crunches
- Difficulty
- Moderate
- Time to result
- ~weeks to results
- Steps
- 6
- Confidence
- 82%
ISO holds are deliberate isometric contractions used to build muscle control, conditioning, and the mind-to-muscle connection that keeps a competitor steady on stage. The mechanism is breath-driven: inhale fully, then crunch the target muscle while exhaling every bit of air, holding maximal tension for roughly three seconds before releasing. Repeated in rounds, this drives enormous blood volume into the muscle and trains the nervous system to command it on demand. The method is applied both as standalone midsection work and layered between working sets for any muscle group, and as dedicated pose rehearsal in the weeks before a show. It is monotonous and brutal, but it produces the visible steadiness and hardness that separate placings.
Origin
Ryan Terry developed his ISO-hold practice over two decades of physique competition, refining it as the backstage habit that let him hold poses rock-steady on the Olympia stage while rivals shook from lack of muscle control.
Core principles
- 01Muscle control is a trainable skill, not a byproduct of size
- 02The unseen work decides who wins on stage
- 03Full exhalation plus maximal contraction floods the muscle and hardens condition
- 04Mind-to-muscle connection beats moving heavier weight
- 05Practice the exact poses you will have to hold under lights and fatigue
How to run it
- 1
Set the breath
Stand tall and inhale fully, hands over your head, before initiating the movement.
Pro tip Do it with your top off so you can watch the muscle actually contract and correct it.
- 2
Crunch and fully exhale
As you come down, crunch the target muscle as hard as you can while exhaling every bit of air out of the body.
Watch out Do not rush the exhale — the empty-lung squeeze is what creates the condition and control.
- 3
Hold maximal tension for three seconds
Keep the muscle fully contracted and held hard for roughly three seconds before releasing.
Pro tip Focus entirely on the mind-to-muscle connection rather than any external load.
- 4
Work the angles
Perform three reps from the front and three from each side so obliques and both abdominal regions are hit.
- 5
Stack rounds with short rest
Do ten reps per angle, take about thirty seconds rest, then repeat for around five rounds until you are dripping and the muscle is fully engorged.
Pro tip The blood volume you get in the midsection this way is enormous — that pump is the signal it worked.
- 6
Layer holds into training and posing
Apply the same hold between working sets on any muscle (e.g. squeeze a double-bicep pose for 20 seconds before the next set), and rehearse holds on every required pose in the weeks before a show.
Pro tip Eight weeks out, do pose-specific ISO holds after fasted cardio for every muscle group.
In the wild
Standing backstage at the Olympia doing back poses, competitors around Terry were visibly shaking and asked how he was holding position so cleanly. His answer was the unseen work: eight weeks out from any show, thirty minutes after fasted cardio, he ran ISO holds through every competition pose and every muscle group. The shaking others showed came from having no trained control over the muscle, not just from being tired or depleted.
→ Rock-steady posing that held up under lights and fatigue where competitors visibly trembled.
Common mistakes
Skipping the full exhale
Holding a crunch without pushing every bit of air out drops the intra-abdominal squeeze that produces the conditioning and control the hold is meant to build.
Neglecting posing practice
Assuming size alone keeps you steady on stage — most on-stage shaking traces back to never doing ISO holds or rehearsing the actual poses.
Is it for you?
Best for
Physique and bodybuilding competitors preparing to hold poses steadily under stage lights and fatigue.
Not ideal for
Beginners chasing raw strength or size who have no posing or conditioning requirement.
From the transcript
“you breathe in, fully breathe in, you exhale every bit of air out of the body, and you crunch your abs as hard as you…”
“eight weeks out from any show, 30 minutes after my fasted cardio, I'll do ISO holes with every every pose I have to do, and…”
From the episode
Britain’s #1 Fitness Model Shares His Bodybuilding Secrets - Ryan Terry - #627
Ryan Terry