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- W2274615310 abstract "Skeletal muscle accumulates intramuscular fat through age and obesity. Muscle quality, a measure of muscle strength per unit size, decreases in these conditions. It is not clear how fat influences this loss in performance. Changes to structural parameters (e.g. fibre pennation and connective tissue properties) affect the muscle quality. This study investigated the mechanisms that lead to deterioration in muscle performance due to changes in intramuscular fat, pennation and aponeurosis stiffness. A finite-element model of the human gastrocnemius was developed as a fibre-reinforced composite biomaterial containing contractile fibres within the base material. The base-material properties were modified to include intramuscular fat in five different ways. All these models with fat generated lower fibre stress and muscle quality than their lean counterparts. This effect is due to the higher stiffness of the tissue in the fatty models. The fibre deformations influence their interactions with the aponeuroses, and these change with fatty inclusions. Muscles with more compliant aponeuroses generated lower forces. The muscle quality was further reduced for muscles with lower pennation. This study shows that whole-muscle force is dependent on its base-material properties and changes to the base material due to fatty inclusions result in reductions to force and muscle quality." @default.
- W2274615310 created "2016-06-24" @default.
- W2274615310 creator A5004671913 @default.
- W2274615310 creator A5058897622 @default.
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- W2274615310 date "2015-08-01" @default.
- W2274615310 modified "2023-10-13" @default.
- W2274615310 title "The effect of intramuscular fat on skeletal muscle mechanics: implications for the elderly and obese" @default.
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- W2274615310 doi "https://doi.org/10.1098/rsif.2015.0365" @default.
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