Researchers want to test if a combination of interventions can help people remain vital for longer. NurPhoto/Getty Images hide caption toggle caption NurPhoto/Getty Images There’s a new study underway to test whether it’s possible to fend off age-related diseases with a novel combination of high-intensity interval training and anti-inflammatory medicines and supplements. The small study includes healthy older adults, aged 65 to 80, who have agreed to try HIIT training, which includes short bursts of cardio, mixed with resistance training. In addition, all the participants will take daily capsules of spermidine, a supplement that is often marketed for healthy aging, as well as a generic medication that has potent anti-inflammatory effects. “As we get older, the immune system is shifting away from good inflammation,” which is the body’s short-term, acute response to fend off injury or infection and promote healing, explains Dr. Thomas Marron, one of the researchers leading the new study. Marron directs early phase clinical trials at The Tisch Cancer Institute at the Icahn School of Medicine at Mount Sinai. In contrast, pathogenic …