A new study published in the Journal of Physiology suggests that a single session of high-intensity interval exercise (HIIT) may significantly slow the growth of cancer cells. Blood serum collected from a group of male colorectal cancer survivors after a single HIIT session showed an immediate reduction in cancer cell growth, which suggests that HIIT may change the environment of the cells. According to lead researcher James Devin, an exercise physiologist at the University of Queensland, “Researchers found there were elevations in some inflammatory markers, known as cytokines, immediately after exercise, and hypothesized that this is what played the biggest role in cell growth reduction."