New research suggests that social sports might be better than exercising by yourself for living longer. In a new study published in Mayo Clinic Proceedings, researchers collected data on physical activity habits from around 8,500 adults with no history of heart disease, stroke or cancer and then monitored them for 25 years. In that time, over half of the participants died. They found a clear link between longevity and social sports. In fact, tennis was the best for longevity, adding almost 10 years to their lifespan. And while group sports and exercise were the best for lifespan, solo exercise was also good. Jogging added over 3 years, and working out at a gym or health club added 1.5 years.