Research has shown that the immune system doesn’t function properly in patients with multiple myeloma, a blood cancer that occurs when plasma cells — a type of white blood cell — multiply out of control. But a clinical trial led by Jens Hillengass, MD, PhD, Chief of Myeloma at Roswell Park Comprehensive Cancer Center, shows that exercise may have the power to strengthen the immune system in those patients, providing a non-pharmaceutical method of helping control the disease.