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Nine Weeks of Resistance Exercise Training Induces Dissimilar Muscle Strength Adaptations Between Sexes in the Upper Body While Lower-Body Strength Gains are Similar Between Sexes Independent of Training Volume

Solheim, Sivert
Master thesis
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URI
https://hdl.handle.net/11250/3204437
Date
2025
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  • Master i treningsfysiologi MAIDR [55]
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Abstract
Styrketrening er assosiert med ei rekke positive helseeffektar. Det er dog uklårt om kjønn påverkar styrketreningsrespons. I denne studien fullførte 30 friske ikkje-styrketrente vaksne (16 kvinner, 14 menn) i alderen 30 til 65 år tre seriar for kvar overkroppsøving, i tillegg til éin serie for kvar øving i underkroppen for det eine beinet, og tre seriar for kvar øving i det andre beinet i tre veker (2-3 økter i veka). Kne-ekstensjonsmoment, effekt og kraft i beinpress, isometrisk armfleksjonskraft og m. vastus lateralis muskeltjukkleik vart målt før og etter intervensjonen. Kvinner hadde større auke i armfleksjonskraft enn menn, medan ingen kjønnsskilnadar vart påvist for auke i underkroppsstyrke, verken i det beinet som trente éin serie eller beinet som trente tre seriar. Treningsvolum påverka ikkje kjønnsskilnadar i styrkeauke i underkroppen. Styrkeauke i underkroppen korrelerte dårleg med endring i m. vastus lateralis muskeltjukkleik, og korrelasjonane var ikkje ulike mellom kvinner og menn.
 
Resistance exercise training is associated with a wide range of health benefits. However it is not clear whether sex influence resistance exercise training adaptations. In this study, 30 resistance-untrained but otherwise healthy adults (16 females, 14 males) aged 30 to 65 performed three sets per upper-body exercise as well as one set per exercise for one leg and three sets for the other leg for nine weeks (2-3 sessions per week). Knee extension torque, leg press power and force, isometric bicep curl force and m.vastus lateralis muscle thickness was measured before and after the interention. Females showed greater increases in bicep curl force than males, while no sex differences were found in lower-body muscle strength gains, in either the one- or three set condition. Lower-body training volume did not influence sex differences in lower-body muscle strength gains. Lower-body muscle strength gains correlated poorly with changes in m. vastus lateralis muscle thickness, and the correlations did not differ between sexes.
 
Publisher
Inland Norway University

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