Numerous medical studies have shown significant health benefits due to playing tennis.  These include:

Physical

• Fitness: improved cardiovascular health
• Strength: improved muscle tone, and bone density
• Better balance

Mental

• Stress reduction
• Cognitive enhancement
• Social engagement
• Fun

As one medical paper said (for the full article see the link below):

According to a study published in the British Journal of Sports Medicine, participation in racquet sports like tennis is associated with a 47% reduction in the risk of early death from any cause. This statistic alone highlights the significant role tennis can play in increasing longevity. The combination of aerobic and anaerobic activity during a tennis match helps regulate blood pressure, lower cholesterol levels, and reduce the risk of heart disease, one of the leading causes of death globally.

Beyond the physical advantages, tennis offers numerous benefits for mental health, which can also influence longevity. 

Cognitive function also benefits from regular participation in tennis. The sport requires players to remain alert, anticipate opponents’ movements, and make quick decisions, which strengthens neural connections in the brain. Studies have shown that racquet sports, including tennis, are associated with enhanced cognitive abilities, including improved memory, problem-solving skills, and quicker reaction times. These cognitive improvements contribute to better quality of life as people age, helping to stave off neurodegenerative conditions like dementia and Alzheimer’s disease.

In conclusion, tennis offers a multitude of benefits that can significantly contribute to a longer, healthier life. Its physical demands improve cardiovascular health, muscle tone, and bone density, all of which are crucial for maintaining mobility and reducing the risk of chronic disease. The mental and emotional benefits of tennis, including stress reduction, cognitive enhancement, and social engagement, further promote a high quality of life and long-term well-being. As a lifelong sport, tennis provides a sustainable way to stay active, engaged, and healthy throughout all stages of life, ultimately supporting increased longevity.

Reference

The above information has been sourced from peer-reviewed, published medical papers including the British Journal of Sports Medicine described in Medtrics