Association of vastus lateralis diffusion properties with in vivo quadriceps contractile function in premenopausal women

Autor: Rebekah S. Carpenter, Michael A. Samaan, Jody L. Clasey, Tim A. Butterfield, Fan Gao, Peter A. Hardy, Lance M. Bollinger
Rok vydání: 2022
Předmět:
Zdroj: Scandinavian Journal of Medicine & Science in Sports. 33:213-223
ISSN: 1600-0838
0905-7188
DOI: 10.1111/sms.14266
Popis: Diffusion tensor imaging (DTI) parameters correlate with muscle fiber composition, but it is unclear how these relate to in vivo contractile function.To determine the relationship between DTI parameters of the vastus lateralis (VL) and in vivo knee extensor contractile.Thirteen healthy, premenopausal women underwent magnetic resonance imaging of the mid-thigh to determine patellar tendon moment arm length and quadriceps cross-sectional area. Fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD) of the VL were determined using diffusion tensor imaging (DTI). Participants underwent an interpolated twitch (ITT) experiment before and after a fatiguing concentric-eccentric isokinetic knee extension (60°·sMD and RD were moderately correlated with peak twitch force and rate of force development. FA and AD were moderately inversely related to percent change in MVIC following exercise.MD and RD are associated with in vivo quadriceps twitch properties but not voluntary strength, which may reflect the mechanical properties of constituent fiber types. FA and AD appear to relate to MVIC strength following fatiguing exercise.
Databáze: OpenAIRE
Externí odkaz: