Hairs collected from 257 Mexican women, residing in Mexico City, were characterized by instrumental measurements for comparison to more-commonly reported Caucasian, Asian and African hairs. Subjects were subdivided into five age groups and their hairs were characterized by fibre dimension, shape and tensile strength. Results show that Mexican hair appears to be intermediate of Asian and Caucasian hair in diameter and cross-sectional ellipticity. Such findings seem in line with the early and late ethnic origins of Mexican people. Results also illustrate and confirm the large intra-and interindividual variability within any single hair property. Unexpectedly high levels of hair tensile damage were sometimes encountered. R esum e Des cheveux pr elev es sur 257 mexicaines, r esidant dans la ville de Mexico, ont et e mesur es et compar es avec des cheveux caucasiens, asiatiques et africains, g en eralement mieux connus. Les sujets ont et e r epartis en 5 cat egories d'âge et leurs cheveux caract eris es selon la dimension de la fibre, leur forme et leur r esistance m ecanique. Les r esultats montrent que les cheveux mexicains se situent, en termes de diam etre et d'ellipticit e, entre les asiatiques et les caucasiens. Cela semble en coh erence avec les origines ethniques r ecentes et anciennes du peuple mexicain. Les r esultats illustrent aussi et confirment la grande diversit e intra et inter individu pour toutes les propri et es du cheveu. Des cheveux anormalement fragiles lorsque soumis a un test de tension ont parfois et e rencontr es.

The purpose of this study was to compare the level of cognitive flexibility of individual and team athletes who are students. The study included a total of 237 volunteer athletes, comprising 140 males (59.1%) and 97 females (40.9%) with a mean age of 18.98 ± 2.18 years (range, 16-26 years) who were licensed to participate in individual and team sports. Study data were collected using the Cognitive Flexibility Scale developed by Martin and Rubin (1995), which consists of 12 items in total. International validity and reliability studies were conducted by Martin and Rubin, and Turkish validity and reliability studies were conducted by Çelikkaleli on high school students (Çelikkaleli, 2014). The scores of the Cognitive Flexibility Scale were found to be higher in the team sports athletes compared with the individual sports athletes (p<0.05). No difference was determined between the levels of cognitive flexibility in male and female athletes. The results indicated that the cognitive flexibility levels of team athletes are higher than those of individual athletes.

The aim of this study is to investigate the effect of sports participation on perceived stress level in deaf adolescents and young adults. A total of 110 deaf people aged between 14 and 25 years participated in the study. The Turkish version of the Perceived Stress Scale (PSS) was used to assess perceived stress level of the participants. The scale is a 5-item Likert scale and 10-item scale. The scores of PSS-10 consist of 0-40. 44 (40.0%) of the participants were female and 66 (60.0%) were male. The mean age of female participants were 16,66 ± 1,36 years and male participants were 17,74 ± 1,65 years. Of the participants, 85 (77.3%) had antenatal and 25 (22.7%) had post-partum hearing impairment. Of the participants, 67 (60.9%) did participate sports and 43 (39.1%) did not participate in sports. No statistically significant difference was found in terms of sex, hearing disability level and having congenital or acquired disability (p> 0.05). The total score of PSS of the athletes were 22,33 ± 6,33 and the total score of the non-athletes were 26,74 ± 3,46. There was a statistically significant difference between the groups (p <0.05). However, no statistically significant difference was found in terms of gender, the grades of hearing disability, and having congenital or acquired disability (p> 0.05). The results of our study showed that the perceived stress levels of deaf adolescents and young adults who participate in sports were lower than compared who did not participate in sports. This study demonstrated sports participation might recommend to adolescents and young adults with hearing impairment for reducing stress.

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