Physiological epigenetics examines how physical activities such as sports, movement, and cryotherapy influence gene expression and impact overall health. This field explores how behaviors and environmental factors can turn genes on or off without changing the DNA sequence. Regular exercise induces beneficial epigenetic changes that enhance muscle performance, improve cardiovascular health, and boost metabolic efficiency. Daily movement and physical activity contribute to positive gene expression related to energy balance and physical resilience. Cryotherapy, or exposure to extreme cold, supports recovery, reduces inflammation, and enhances cellular repair through epigenetic modifications. Understanding these mechanisms allows for the development of personalized fitness and recovery programs that maximize health benefits and improve athletic performance. Physiological epigenetics highlights the significant impact of physical activities and environmental therapies on our genetic expression, offering pathways to improved health and well-being through tailored interventions.