Date of Award


Degree Type


Degree Name

Doctor of Philosophy


There has been much research on strength changes with aging and the consequent effects of resistance training, however, relatively little is known about lengthening (eccentric; ECC) muscle actions. The purposes of these studies were to develop a method of testing and training plantar (PF) and dorsiflexion (DF) of the ankle in a standing position in order to investigate age-related and training effects on shortening (concentric; CONC) and ECC peak torque (PT) in women.;All subjects were healthy and physically active, and performed all testing and training on an isokinetic dynamometer. Strength testing was performed in both standing and supine positions at 30 degrees per second ({dollar}\sp\circ{dollar}/s), between 20{dollar}\sp\circ{dollar} PF to 10{dollar}\sp\circ{dollar} DF. Testing on two occasions, one week apart, had acceptable reproducibility for PT (ICC{dollar}\sb{lcub}2,1{rcub}{dollar} & r = 0.60 to 0.90, p {dollar}\ 0.84, \ p\ {dollar}85% of PT. Significant increases occurred in standing CONC (28%) and ECC (17%) DF PT and PF RTD, but no significant changes were found for PF PT, or for supine PT, PRT or DF RTD.;These findings suggest that: (1) a standing position can be used to test strength and PRT, (2) PF and DF ECC strength is preserved with age, and (3) ECC DF training can improve both CONC and ECC DF strength.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.