Effects of Short-Term Aerobic Exercise on Single Muscle Fibers of Older Women

KCollege.Access.ContactIf you are not a current Kalamazoo College student, faculty, or staff member, email dspace@kzoo.edu to request access to this thesis.
dc.contributor.advisorSotherland, Paul R., 1953-
dc.contributor.advisorHarber, Matthew
dc.contributor.authorJones, Stephanie
dc.date.accessioned2011-12-05T16:00:30Z
dc.date.available2011-12-05T16:00:30Z
dc.date.issued2009
dc.descriptionvi, 27 p.en_US
dc.description.abstractSarcopenia, or loss of muscle mass with aging, affects about 45% of elderly humans (age 60 and older) in the United States. Previous studies showed that strength training and long-term aerobic programs help combat muscle loss, indicating that the best way to prevent or treat sarcopenia is with exercise. The purpose of this study was to characterize the influence of a shortterm (12 week) aerobic exercise training program on cellular composition and size of muscle fibers in older women (60-80 yrs). We biopsied the vastus lateralis muscle of nine older women before and after 12 weeks of aerobic training. We the~ determined the change in composition of five myosin heavy chain (MHC) isoforms using SDS-PAGE and the change in diameter of MHC I and MHC lIa fibers using computer imaging. MHC I fibers increased by 180/0, whereas MHC lIa fibers decreased by 17% from pre- to post-aerobic training. Diameters of MHC I and MHC lIa fibers did not change. Therefore, we showed that short-term aerobic exercise can change muscle fiber composition but not fiber size. We also confirmed that muscle fiber changes can be induced in older women and that starting and maintaining an aerobic training program is useful for both the prevention and treatment of sarcopenia.en_US
dc.description.sponsorshipHuman Performance Laboratory. Ball State University. Muncie, Indiana.
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/10920/24201
dc.language.isoen_USen_US
dc.publisherKalamazoo Collegeen_US
dc.relation.ispartofKalamazoo College Biology Senior Individualized Projects Collection
dc.relation.ispartofseriesSenior Individualized Projects. Biology;
dc.rightsU.S. copyright laws protect this material. Commercial use or distribution of this material is not permitted without prior written permission of the copyright holder.
dc.titleEffects of Short-Term Aerobic Exercise on Single Muscle Fibers of Older Womenen_US
dc.typeThesisen_US
Files