Single muscle fiber adaptations to resistance training in men and women over 80 Y

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dc.contributor.advisor Trappe, Scott William en_US Slivka, Dustin R. en_US 2011-06-03T19:31:11Z 2011-06-03T19:31:11Z 2006 en_US 2006
dc.identifier LD2489.Z68 2006 .S59 en_US
dc.description.abstract The purpose of this study was to investigate whole muscle and single muscle fiber adaptations in old men (OM) and old women (OW) over 80 years of age in response to progressive resistance training (PRT). Six OM (82±1 y, 74±4 kg, BMI 25±1 kg•m-2) and six OW (85±1 y, 67±3 kg, BMI 27±1 kg•m-2) resistance trained the knee extensors (3 sets, 10 repetitions) at 70% one repetition maximum 3 d•wk-1 for 12 wks. Vastus lateralis muscle biopsies were obtained before and after the PRT program. Isolated muscle fibers were studied in vitro at 15°C for diameter (Dia), peak tension (Po), unloaded shortening velocity (Vo), and absolute peak power (Abs Pwr). With PRT, OM increased whole muscle strength (40±6%, p<0.05), with no change in whole muscle size. OW also increased whole muscle strength (26±6%, p<0.05) without a change in whole muscle size. No differences were observed in any of the single muscle fiber parameters among MHC I or MHC IIa muscle fibers from OM or OW. The novel finding of this study was that despite an increase in whole muscle strength there was no change in whole muscle size, single fiber diameter, or single fiber contractile function. Given that there was no change in muscle size or cellular function with PRT, the improvement in whole muscle strength point to neurological changes. These data suggest that the hypertrophic mechanisms that are typically apparent in humans with PRT are attenuated in individuals over 80 y. en_US
dc.description.sponsorship School of Physical Education, Sport, and Exercise Science
dc.format.extent ix, 121 leaves : ill. ; 28 cm. en_US
dc.source Virtual Press en_US
dc.subject.lcsh Skeleton -- Muscles. en_US
dc.subject.lcsh Weight training -- Physiological aspects. en_US
dc.subject.lcsh Exercise for older people -- Physiological aspects. en_US
dc.title Single muscle fiber adaptations to resistance training in men and women over 80 Y en_US Thesis (Ph. D.) en_US
dc.identifier.cardcat-url en_US

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  • Doctoral Dissertations [3248]
    Doctoral dissertations submitted to the Graduate School by Ball State University doctoral candidates in partial fulfillment of degree requirements.

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