| Type | Balance technique |
| Does | Counterbalances the body |
| Prevents | Barn-dooring |
| Difficulty | Intermediate |
Flagging is a balance technique where you extend a free leg to act as a counterweight, keeping your body in balance and stopping it from swinging out when holds are off to one side. It lets you reach and stay stable without a foothold for the trailing foot.
How it works
When you’d otherwise barn-door, you press or hang the free leg out to the side or behind you. That counterweight keeps your centre of gravity over your holds so you can move statically.
The variations
Inside flag (foot crosses in front), outside flag (foot to the side), and rear flag (foot tucked behind). Each counters a different imbalance.
Why it matters
Flagging saves energy by keeping movement controlled and static instead of swinging — a foundational skill on steep boulders and routes.
Frequently asked questions
What is flagging used for?
Flagging keeps you balanced when your holds are stacked on one side of your body, which would otherwise swing you outward off the wall. By pressing or hanging a free leg out to the side or behind you, you create a counterweight that stabilises the reach.
What are the types of flagging?
The main variations are the inside flag (free foot crosses in front), the outside flag (free foot out to the side), and the rear or back flag (free foot behind the other leg). You choose based on which side needs counterbalancing.
What is barn-dooring?
Barn-dooring is when your body swings open like a door because your weight isn't balanced over your points of contact — typically with holds on one side. Flagging the free leg is the standard fix.
Sources
- Climbing movement — American Alpine Club