A Self-Determination Theory Based Intervention to Increase Levels of Cardiorespiratory Fitness, Self-Determined Motivation, Physical Activity and Improve Health Outcomes Among Patients Living with Rheumatoid Arthritis - Duda, J.; Fenton, S.; van Zanten, J.; Metsios, G.; Rouse, P.; Ntoumanis, Nikos; Yu, C.; Koutedakis, Y.; Kitas, G. (WILEY, 2016)