Age, lifestyle and self-perceptions of hair : is there an association with hair diameter and tensile properties / Lane Duvel in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 41, N° 5 (10/2019)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 41, N° 5 (10/2019) . - p. 509-515 Titre : Age, lifestyle and self-perceptions of hair : is there an association with hair diameter and tensile properties Type de document : texte imprimé Auteurs : Lane Duvel, Auteur ; A. Herbal, Auteur ; L. Daniels, Auteur ; R. Kong, Auteur ; Greg. G. Hillebrand, Auteur Année de publication : 2019 Article en page(s) : p. 509-515 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Âge Biophysique Epidémiologie Indice de masse corporelle Perception Tabagisme Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : To determine the association of age, lifestyle habits and the self‐perception of hair condition with the objectively measured physical properties of hair in Caucasian females with brown hair. - Methods : Hair biophysical properties, lifestyle habits data and self‐perceptions of hair condition were collected on 110 Caucasian females with brown hair ranging in age from 17 to 78. Hair diameter (cross‐sectional area) and tensile properties (elastic modulus, break strength and break extension) were measured at the root end of individual fibres (n = 100/subject) from the crown and frontal regions using objective instrumental methods. Other measures included body mass index (BMI) and Savin female pattern hair loss grades based on judging of standardized front, top and side view head images. Lifestyle habits and practices and self‐perceived hair condition were obtained via a standardized self‐assessment questionnaire. - Results : Hair fibre diameter and break extension decreased significantly with age. Hair fibre elastic modulus and Savin hair loss scores increased significantly with age. No age‐related change in hair fibre break stress was observed. A history of smoking or being overweight was significantly associated with having lower hair fibre cross‐sectional area but was not associated with any of the measured tensile properties. Subjects who perceived their hair as fine, thinning or weak had significantly lower cross‐sectional areas than subjects who did not. Subjects who perceived their hair to be healthy or strong had significantly higher cross‐sectional areas than subjects who did not. - Conclusion : The biophysical properties of hair change significantly with age. A history of smoking or being overweight was significantly associated with having smaller hair cross‐sectional area but was not associated with differences in hair tensile properties. The self‐perception of having strong or healthy hair seems more associated with having a larger cross‐sectional area than any real differences in hair strength. Note de contenu : - MATERIALS AND METHODS : Study design - Hair sample collection - Self-assessment questionnaire - Hair cross-sectional area and tensile properties - Hair density via savin female pattern hair loss grades - Body mass index - Statistics - RESULTS AND DISCUSSION : Hair cross-sectional area by age, scalp site and hormonal status - Hair tensile property changes DOI : 10.1111/ics.12569 En ligne : https://drive.google.com/file/d/1Rv8lJFUHuDPc9-B5OImxiCXWJpFwm8c6/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33231 [article]

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