One-Arm Hangs: How to Start and Stay Safe

Start one-arm hangs only once two-arm max hangs are routine and pain-free, begin assisted, and set the load as a share of your one-hand maximum. Evidence level: low. One 4-week trial used one-hand maximal pulls safely in 14 advanced climbers; the rest of the advice below is coach practice, not tested.

What do one-arm hangs do?

They put the whole load on one hand, which roughly doubles the load on that hand’s fingers compared with a two-arm hang of the same total load. They also let you train and measure each hand separately. In a 2022 trial, 14 climbers did maximal 6-second pulls, one hand at a time: 2 sets of 6 per hand, twice a week for 4 weeks, with 5 minutes between sets. Maximal strength rose 14.3%, and the paper mentions no adverse events. Those climbers were advanced or elite and had no hand or upper-limb injury in the previous six months.

How do you build up to a free one-arm hang?

Reduce the assistance in small steps:

Two arms, feet on the floor. Pull with one hand harder than the other while the feet take the rest (no-hangs). On a force plate, the weight you take off the plate is the load you hold.
One hand on the edge, the other on a sling or a loop that takes part of your weight.
Pulley or counterweight that takes off a known amount of body weight.
Feet lightly touching the floor, then less and less support.
Free one-arm hang, with added weight only once you do many clean sets.

Move one step at a time, and keep the edge, grip and hang length fixed within a block so you can see progress.

How hard should a one-arm hang be?

Set it as a percentage of your one-hand maximum, not of body weight: body weight might be 60% of one climber’s one-hand max and 95% of another’s (illustrative figures). This start extends the two-arm max hang protocol to a single hand:

Parameter	Setting
Grip	Half crimp, on 18 to 20 mm
Hang	6 to 10 seconds
Effort	Strong, but about 3 seconds in reserve; never to failure
Rest	3 minutes between hangs, as in the max hang studies
Volume	2 to 4 hangs per hand
Frequency	Once or twice a week, 48 hours apart, after a full warm-up
Form	Start and end each hang smoothly, never jump onto the hold; shoulder engaged, elbow slightly bent
Stop rules	Any pain, especially at the base of a finger, in the elbow or the shoulder; grip opening; loss of position

Use a spotter or a soft floor for free one-arm hangs: letting go suddenly at the end of a set is where falls happen.

What about asymmetry?

Expect one hand to be stronger. In 36 male climbers, the stronger hand produced about 4.1% more finger-flexor force in a one-arm test, and the authors suggest monitoring unilateral strength regularly to avoid large gaps. Measure both hands, start with the weaker one, and give the stronger hand the same load and sets so the gap does not widen.

Who are one-arm hangs for?

Climbers whose two-arm base is solid. There is no validated threshold, but a fair one is:

You do max hangs comfortably on a 20 mm edge, with several months of consistent training behind you.
No finger, pulley, elbow or shoulder pain in the last months.
You can hang with good shoulder position, arms straight but not locked.

Who should not:

Anyone with current finger, pulley, tendon, elbow or shoulder pain, or a recent injury. If symptoms persist after a session, see a physiotherapist.
Growing teenagers, without a coach or physiotherapist who knows adolescent climbers.
Climbers with little hangboard experience: two-arm no-hangs or beginner hangs come first.

Do this in Entralpi

The max strength test measures the max of each hand. Settings hold one value, for one hand. The test offers your stronger hand’s as your max; to train the other hand, type its max in Settings (Profile, then Settings, under Physical Profile, Max strength). In the Train tab, choose a workout, or build your own with 6 to 10 second hangs, 3 minutes of rest and a load as a share of that hand’s max. Without the plate, the timer paces the hangs, but you lose the load reading.

Sources

Devise M, et al. (2022). Effects of different hangboard training intensities on finger grip strength, stamina, and endurance. Frontiers in Sports and Active Living.
Hartley C, Taylor N, Chidley J, Baláš J, Giles D (2023). Handedness, bilateral, and interdigit strength asymmetries in male climbers. International Journal of Sports Physiology and Performance, 18(12).