One Arm Trainer

The One Arm Trainer is a suspended training tool designed to progressively load one arm by shifting the balance point of the system.
It is suited for climbers who want to build toward one-arm strength without immediately requiring full bodyweight on a single arm.

What this solves
Training one-arm strength is difficult because the jump from two arms to one arm is too large for most climbers.

How this solves it
By shifting the rope away from the center, more load is transferred to one arm while the other arm assists. This allows gradual progression toward one-arm loading.

Why this tool
Unlike fixed setups, this creates progressive unilateral loading without added weights:

• Adjustable load between arms
• Continuous progression toward one-arm strength
• Works with different grip attachments

However, the instability from the rope reduces precision compared to fixed systems.

Best for
Intermediate / Advanced — for climbers working toward one-arm hangs or unilateral pulling strength.

Key features
Progressive one-arm loading via rope position
Works with multiple grip attachments
Portable and easy to set up
No additional weights required for progression

Used with
Basic handles or grip attachments
Anchor point (pull-up bar, beam, etc.)

What’s in the box
One Arm Trainer (wood + selected holds)
Rope + rope length adjuster

Dimensions

Material: Rubberwood

Installation guide:

Step 1: Basic handles assembly

Step 2: Attach rope to O.A.T

Step 3: Rope length adjuster installation

Step 4: Hang it all up