Cross-fiber friction (massage, deep tissue) with light loading breaks up scar tissue and then the loading stimulates collagen to be laid down in the direction of the force acting on it=stronger connective tissue.
For example chronic bicep tendonitis from ring work. Crossfiber friction/deep tissue work. 4-5 sets of 15-30 bosy rows, followed by ice massage to numbness. No frostbite!
"Survival will be neither to the strongest of the species, nor to the most intelligent, but to those most adaptable to change."