Strong fingers, healthy joints,
better days on the rock.
Evidence-based training, injury prevention and crag guides for everyday climbers, from a strength and conditioning coach who climbs for the love of it.
Start trainingConvert gradesEverything between the gym and the crag
Training
Finger strength, hangboarding and bouldering programs built on the same principles a strength and conditioning coach…
Injuries & prevention
Clear, research-based guides to the injuries climbers get most: finger pulleys, tendons and elbows. Every rehab article…
Gear
Honest guides to the equipment that actually helps you train and climb better. No paid placements, and we only…
Home wall & boards
Planning a home training wall? Angles, plywood, holds, costs and how Kilter, MoonBoard and Tension boards…
Crags & trips
Practical guides to the world's best bouldering areas, starting with Fontainebleau: when to go, where to stay, which…
AI-generated illustration based on Petr's portrait.
Hi, I'm Petr.
I'm a strength and conditioning coach in Prague. I train individuals and sports clubs, and climbing became my favourite complement to that work. Bouldering combines everything I care about as a coach: grip and finger strength, shoulder stability, mobility and body tension.
Chalk & Crag is where I share the training principles I use with clients, applied to climbing and written for normal people with jobs, not pros with 20 hours a week.
More about meFont, V-scale, or both?
Convert bouldering grades between the Fontainebleau and Hueco (V) scales in one click, ready for your next trip.
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Bouldering Training Program: Weekly Plans by Level
A bouldering training program for beginner, intermediate and advanced climbers: weekly plans, session templates, rest days, deloads and how to progress.
Fontainebleau Bouldering Guide for First-Timers
A first-timer's Fontainebleau bouldering guide: best season, getting there by train or car, beginner areas, circuits, guidebooks, where to stay and the ethics.
Best Crash Pads for Bouldering: Buyer's Guide (2026)
The best crash pad for bouldering depends on your landings and approach. Compare size, thickness, weight and fold style of 7 well-reviewed pads.
How to Build a Home Climbing Wall: A Full Guide to an Adult Training Wall
How to build a home climbing wall for adult training: space, ceiling height, 30–45° angles, kicker, plywood, T-nut grids, framing, holds, matting and safety.
Hangboard Program: The Complete Guide to Stronger Fingers
A practical hangboard program for climbers: who is ready, edge size, grip types, max hangs vs repeaters, frequency, and a sample 8-week plan with safety rules.
How to Get Better at Bouldering: 17 Tips That Work
17 ways to get better at bouldering faster: footwork, reading problems, projecting, strength and recovery. Practical tips for beginners and intermediates.