RT Journal Article SR Electronic T1 Cross-Validation of the Recumbent Stepper Submaximal Exercise Test to Predict Peak Oxygen Uptake in Older Adults JF Demo Journal of Physical Therapy FD HighWire Press SP 722 OP 729 DO 10.demo/ptj.20130307 VO 94 IS 5 A1 Herda, Ashley A. A1 Lentz, Angela A. A1 Mattlage, Anna E. A1 Sisante, Jason-Flor A1 Billinger, Sandra A. YR 2014 UL http://demo.highwire.org/content/94/5/722.abstract AB Markup server — Error Not Found The page you were trying to reach could not be found. Please check the address for the page you were trying to reach. If you believe you have reached this page in error, you may contact us with any questions.