Individualized Tendon Loading

Individualized tendon loading is presented as a way to improve tendon adaptation by targeting the strain actually experienced by the tissue. A central idea is that tendon strain, not just external load or training volume, determines whether adaptation is beneficial. Research is reviewed showing that higher tendon strain increases stiffness, while both too little and too much strain can lead to an unfavorable response. The effective range is described as roughly 4.5% to 6.5% strain. The explanation then focuses on muscle-tendon imbalances, which mean that the same exercise intensity can produce very different tendon strain levels in different people. To address this, an individualized program for adolescent athletes used repeated dynamometry and ultrasound assessments to prescribe isometric loading at strain levels near the upper anabolic range. This approach increased tendon stiffness and reduced harmful fluctuations in tendon strain. The final part covers efforts to predict tendon strain during dynamic tasks such as quarter squats. Although responses varied greatly between individuals, strain could be estimated reasonably well from isometric testing. Practical implementation remains challenging, but simplified assessment methods and automated analysis may make personalized tendon training more feasible.