AI Article Synopsis
- The study examines how age and body mass index (BMI) affect the firmness and mechanical properties of skin, specifically analyzing the velocity of shear wave propagation.
- The research involved measuring resonance running time on the forearm of 110 adults and focused on changes in skin elasticity associated with aging, particularly in individuals over 60 with a normal BMI.
- Results indicated that while minimum resonance times were consistent across ages and BMI, older subjects displayed increased skin laxity and mechanical anisotropy, suggesting changes in skin properties as people age.
Article Abstract
Background: The in vivo visco-elastic characteristics of skin depend on a series of physiopathological parameters. Among them, the age-related intrinsic tensile properties and the preconditioning of the tissues set under tension by the hypodermal volume might be of importance.
Aims: To revisit the influence of age and body mass on the firmness and mechanical anisotropy of the skin as determined by the velocity of the shear wave propagation.
Method: Resonance running time measurements (RRTM) were performed on the mid volar forearm in 110 adults of both sexes. In each subject 16 RRTM were collected at four different precise angles with regard to the limb axis. We recorded the lowest, the highest and the mean multidirectional RRTM as well as the coefficient of variation (CV) of the latter value. In addition, the body mass index (BMI) was calculated.
Results: Age and BMI did not influence the minimum RRTM. In contrast, the maximum RRTM as well as the mean and CV of the multidirectional RRTM, significantly rose in a progressively increasing proportion of the subjects older than 60 years. These changes were only encountered in subjects with a normal BMI ranging from 18 to 25. Sex-related differences were not disclosed.
Conclusions: The intrinsic skin tension lines identified by the minimum RRTM are not significantly altered with age and BMI variations. In contrast, skin laxity identified by larger maximum and mean multidirectional RRTM may increase after 60 years of age in subjects with a normal BMI. This is accompanied by increased skin mechanical anisotropy identified by CV values of the multidirectional RRTM over 40%.
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| http://dx.doi.org/10.1016/s0531-5565(00)00219-9 | DOI Listing |
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Article Synopsis
- The study examines how age and body mass index (BMI) affect the firmness and mechanical properties of skin, specifically analyzing the velocity of shear wave propagation.
- The research involved measuring resonance running time on the forearm of 110 adults and focused on changes in skin elasticity associated with aging, particularly in individuals over 60 with a normal BMI.
- Results indicated that while minimum resonance times were consistent across ages and BMI, older subjects displayed increased skin laxity and mechanical anisotropy, suggesting changes in skin properties as people age.
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