1. A Systematic Review of Fitness Apps and Their Potential Clinical and Sports Utility for Objective and Remote Assessment of Cardiorespiratory Fitness Bookmark Author: Muntaner-Mas, A., Martinez-Nicolas, A., Lavie, C. J., Blair, S. N., Ross, R., Arena, R., and Ortega, F. B. Publication year: 2019 DOI: 10.1007/s40279-019-01084-y