authors Dan Rubin, MD Dalton, Allison Tank, Allyson Berkowitz, Mark Arnolds, David E Liao, Chuanhong Gerlach, Rebecca M
has subject area Actigraphy Aged Cardiorespiratory Fitness Exercise Tolerance Female Fitness Trackers Health Status Humans Male Middle Aged Mobile Applications Pilot Projects Predictive Value of Tests Preoperative Care Prospective Studies Reproducibility of Results Smartphone Surveys and Questionnaires Telemedicine Walk Test