Date of Award
1996
Degree Type
Dissertation
Degree Name
Doctor of Philosophy
Abstract
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.
Recommended Citation
Porter, Michelle Marie, "Effects Of Aging And Strength Training On Shortening And Lengthening Muscle Actions In Women" (1996). Digitized Theses. 2600.
https://ir.lib.uwo.ca/digitizedtheses/2600