Browsing by Author "Sigurdsson, Sigurdur"
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- Accelerated decline in quadriceps area and Timed Up and Go test performance are associated with hip fracture risk in older adults with impaired kidney functionPublication . Marques, Elisa A.; Elbejjani, Martine; Viana, João L.; Gudnason, Vilmundur; Sigurdsson, Gunnar; Lang, Thomas; Sigurdsson, Sigurdur; Aspelund, Thor; Siggeirsdottir, Kristin; Launer, Lenore; Eiriksdottir, Gudny; Harris, Tamara B.This study aimed to examine whether an accelerated decline in quadriceps cross-sectional area (CSA), attenuation (a surrogate of quality), and strength, as well as lower limb muscular function, are associated with hip fractures in older adults with impaired kidney function.
- Associations of 24-hour sleep duration and CT-derived measurements of muscle and bone: The AGES-Reykjavik StudyPublication . Marques, Elisa A.; Figueiredo, Pedro; Gudnason, Vilmundur; Lang, Thomas; Sigurdsson, Gunnar; Sigurdsson, Sigurdur; Aspelund, Thor; Siggeirsdottir, Kristin; Launer, Lenore; Eiriksdottir, Gudny; Harris, Tamara B.Although the importance of sleep on preservation of several physiological functions is well known, the relationship with the two interconnected tissues - muscle and bone is less understood.
- Associations of Quadriceps Torque Properties with Muscle Size, Attenuation, and Intramuscular Adipose Tissue in Older AdultsPublication . Frank-Wilson, Andrew W; Chalhoub, Didier; Figueiredo, Pedro; Jónsson, Pálmi V; Siggeirsdóttir, Kristín; Sigurdsson, Sigurdur; Eiriksdottir, Gudny; Guðnason, Vilmundur; Launer, Lenore; Harris, Tamara BAtrophy and fatty infiltration of muscle with aging are associated with fractures and falls, however, their direct associations with muscle function are not well described. It was hypothesized that participants with lower quadriceps muscle attenuation, area, and greater intramuscular adipose tissue (IMAT) will exhibit slower rates of torque development (RTD) and lower peak knee extension torques.