This chapter introduces the practical precursors, consequences, and studies on differential learning (DL). Rooted in systems dynamics, neurophysiology, second order cybernetics, and biomechanics, DL is primarily supported by experimental evidence from sports, demonstrating how intentional fluctuations enhance adaptability, skill acquisition, and brain activation. Key subtopics include the role of stochastic resonance in movement learning, the impact of noise on motor control, and the influence of DL on long-term skill retention and tactical behavior in team sports. While the initial focus was on empirical findings in athletic performance, these served as a foundation for a broader application. The subsequent five chapters 4 to 8 will then, based on experimental studies, extensively explore DL’s relevance to specific fields of physiotherapy, illustrating its potential for rehabilitation, injury prevention, and neuroplasticity-driven motor recovery. By shifting the paradigm from rigid instruction to individualized, self-organized learning, DL offers transformative implications for both sports science and clinical therapy.