Justin has either led or been integrally involved with 18 completed trials that investigated the effects of exercise on various diseases among people with and without disabilities (Spinal cord injured, Children with Epilepsy, Obese children, Obese adolescents, Obese adults, Type 2 diabetic and Cancer patients) and is currently the PI or co-investigator on four ongoing trials investigating the role of exercise in cancer population including colorectal and breast cancer patients.