Professor Kelly A. Mackintosh is an associate professor in the College of Engineering at Swansea University in the United Kingdom. She earned her bachelor's degree in sport and exercise science from the University of Bath, her master's degree in sports science from Loughborough University, and her Ph.D. in children's physical activity and health from Liverpool John Moores University. She worked as a postdoctoral researcher in the College of Engineering at Swansea University in 2012 and as a senior lecturer in the same college from 2012 to 2019. Her research interests include physical activity, children, physical activity interventions, physical activity measurement, and behavior change.