20 boulders in 20 minutes
20 boulders in 20 minutes at flash level or one grade below. Keep going when pumped.
- Slot
- On the wall
- Focus
- Endurance
- Time
- 20 min
- Intensity
- Moderate intensity
- Injury risk
- Low injury risk
- Equipment
- Boulders, Easy circuit, Timer
How to do it
Climb 20 boulders in 20 minutes on vertical or overhanging terrain. Prioritize clean movement, and not stopping or giving up when pumped.
Run it now
The same timer as the app: a five-second get-ready, then every round and rest counted down with a beep. Keep this page open while you train.
20 boulders in 20 minutes
0:00 / 20:05
Ready
20:05
20 rounds
20 boulders in 20 minutes at flash level or one grade below. Keep going when pumped.
High risk: read the protocol, stop if anything feels wrong.
- 20
- rounds
- 20:05
- total
Done.
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Take the quizWho it's for
Volume and pacing in one twenty-minute block. It's a good way to end a session, and a good way to find out how you climb when you're already pumped.
Common mistakes
- Sprinting the first ten. Even pace. Twenty in twenty means one a minute, not fifteen in eight.
- Letting movement fall apart at the end. Clean climbing is the standard, pumped or not.
- Picking boulders that are too hard. Flash level or one below.
How to progress
Steeper terrain or a grade up, same twenty minutes. If you're finishing with time to spare, add boulders rather than difficulty.
When it fits
The training periods this exercise fits into in Blok Sessions.
Base Lots of easy climbing, good movement and aerobic fitness.
Power Endurance Keep your power through one hard move after another.
Endurance Climb longer before you pump out, by moving efficiently.
Deload Train less, let your fingers recover, keep moving.