Boulder TrainerBoulder Trainer
Get the app
Blog

Training, fingers and hangboards

Protocols, gear notes and what the research actually says — written by a climber who builds the app you train with.

GradesFeatured

Climbing Grade Conversion: Font, V-Scale, German 1–8 & IRCRA

Font, V-Scale, the German gym 1–9 level system and the research-standard IRCRA scale all measure the same thing differently. Here is a full conversion chart — and an honest look at where the numbers stop lining up.

9 min read
Training

Campus Board vs Hangboard: Which Do You Need?

One builds maximum finger strength, the other explosive power — and most climbers only need one of them. Here's how to choose, and when a campus board is worth the risk.

7 min read
Training

RPE in Climbing: Train Hard Without Overtraining

Fixed percentages assume you're identical every day — you aren't. Here's how RPE and autoregulation let you match load to how your fingers actually feel, backed by strength science.

7 min read
Training

Bouldering Training Plan: Periodization for Home & Gym

Stop training randomly. Here is how to structure a bouldering plan into base, strength, power and deload phases — and how to pick linear, block or undulating periodization for your life.

7 min read
Injury prevention

Pulley Injuries in Bouldering: Signs & Prevention

The pop you never want to hear. Here's how to recognize a finger pulley injury, why crimping multiplies the risk, and how to prevent and rehab it based on the research.

8 min read
Hangboard

How Often Should You Hangboard? The Research

Two to three sessions a week, 48 hours apart — but the real answer depends on your total finger load, not just hangboard days. Here's what the studies actually say.

7 min read