Engaging large muscle fibers by gripping as hard as possible for 3–5 seconds after a slow 1–2 second build-up of force. 3. The Psychology of Experience
When using tiny "crimp" edges, "mature" or highly trained climbers often wrap their thumb over their index finger to increase power and stability. free solo mature thumbs
Expert climbers use their thumb as a secondary point of contact on nearby crystals or bumps to maintain balance while shifting weight. 2. Training for "Mature" Finger Strength Engaging large muscle fibers by gripping as hard
In crack climbing, tucking the thumb into the palm can expand the hand’s width to secure a "jam" in cracks between 1.5 to 2.5 inches. free solo mature thumbs