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Lack of physical activity is associated with various chronic diseases, while regular exercise, conversely, helps prevent them. Among these dangerous conditions are cancer, cardiovascular diseases, metabolic and neurodegenerative disorders, as well as musculoskeletal issues. Intense physical activity leads to long-term tissue adaptations that improve and protect our health. Despite the known benefits, the molecular mechanisms behind these adaptations remain poorly understood. German scientists from the Technical University of Dortmund have studied exerkines—molecules produced in response to exercising—and their impact on tissues and overall bodily adaptation.
What are Exerkines?
Exerkines are exercise-induced signaling molecules that could be key to preventing and treating chronic diseases. These molecules—proteins, peptides, lipids, nucleic acids, and metabolites—are released, particularly by muscles and the liver during physical exertion, and interact with cells to stimulate adaptation. From improving cardiovascular function to enhancing metabolism, exerkines are a powerful tool through which physical activity promotes health.
A lack of physical activity is a significant risk factor for developing dangerous chronic diseases. Globally, over two-thirds of adults are at risk due to a sedentary lifestyle. Therefore, physical exercise is not only an excellent way to stay in shape but also a crucial public health strategy.
How Exerkines Work
During physical exercise, the body undergoes physiological changes to meet the increased demand for oxygen and nutrients. These changes trigger the release of exerkines from skeletal muscles and the liver. These molecules then interact with target cells in various organs, helping to improve vascularization (the formation and repair of blood vessels), enhance immune function, and boost metabolic processes. As such, regular physical exercise serves as a cost-effective and efficient method for protecting against chronic diseases.
The preventive effects of exerkines are still being studied, but it is known that specific molecules like irisin and follistatin promote fat metabolism and improve insulin sensitivity. Irisin regulates the conversion of white adipose tissue to brown adipose tissue, aiding in weight loss and enhancing the body’s adaptation to physical activity. Follistatin reduces appetite and supports muscle growth. Both substances play a crucial role in preventing obesity and type 2 diabetes. Similarly, exerkines may improve cardiovascular health by supporting the growth of new blood vessels and enhancing heart function.
Prevention of Chronic Diseases
One of the most promising aspects of exerkines is their potential in preventing chronic diseases. For example, regular physical exercise has been proven to reduce the risk of developing coronary artery disease by 30%. Exerkines are believed to be a key factor in this protective effect. They not only improve cardiovascular function but also help regulate blood sugar levels and reduce inflammation, which is critical for preventing metabolic diseases.
Furthermore, exerkines have neuroprotective potential. Research suggests that exerkines can improve cognitive function and delay the progression of neurodegenerative diseases, such as Alzheimer’s disease. This is especially important given the aging global population and the expected tripling of people living with dementia by 2050.
The Future of Exerkine Research
As research advances, the potential for using exerkines in clinical settings grows. Scientists are exploring the development of “exercise mimetics”—drugs that could replicate the action of exerkines for those who cannot exercise due to health limitations. This could fundamentally change the approach to preventing and treating chronic diseases.
Understanding the molecular mechanisms by which physical exercise prevents diseases and supports healthy aging is of utmost importance. Harnessing the power of exerkines will enable the development of new strategies to combat the global epidemic of chronic diseases and improve the quality of life for everyone.
