“One of the most fascinating and unexpected findings was the role of wind in a tree’s life. Before reaching maturity, many trees in the biosphere snapped under their own weight. Researchers learned later this was caused by lack of stress wood—a wood that forms in place of normal wood as a response to external forces. This necessary mechanical acclimation was lacking in the biosphere trees, preventing them from surviving. There’s an underlying principle at work here. Stress creates resilience. Lack of stress creates weakness. In the case of the biosphere trees, the stress they were missing was wind. Wind doesn’t just blow in one direction, or at one speed. It’s constantly changing directions, slowing down, speeding up—creating an infinite array of forces for the trees to counterbalance against. Ironically, the lack of varied movement and counterforce is what felled the trees. p.151” MovementHealthResistanceFitnessTreesMobility Book:Built from Broken: A Science-Based Guide to Healing Painful Joints, Preventing Injuries, and Rebuilding Your Body Source: Built from Broken: A Science-Based Guide to Healing Painful Joints, Preventing Injuries, and Rebuilding Your Body