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Bone mineral density and accelerometer-determined habitual physical activity and inactivity in postmenopausal women [Kostní denzita a habituální pohybová aktivita a inaktivita u postmenopauzálních en]

Keywords: Osteopenia , dual x-ray absorptiometry , accelerometer , sitting , household-related physical activity.

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Abstract:

BACKGROUND: In postmenopausal women, physical activity appears to be important in preventing loss of bone mineral density (BMD) and osteoporosis and thus contributes to the reduction of fracture risk. OBJECTIVE: This cross-sectional study aimed to investigate the differences in habitual physical activity, physical inactivity and meeting physical activity recommendations between women with normal femoral BMD and women with osteopenia. METHODS: Out of the ninety-two postmenopausal women analyzed in this study, 72.8% women had normal femoral BMD and 27.2% women were osteopenic. Their BMD and body composition were measured using Dual Energy X-ray Absorptiometry. The region of interest was the total proximal femur. Seven days of physical activity were objectively assessed by using the ActiGraph GT1M accelerometer. Daily activity and inactivity logs were used for the participants to self-record their times (minutes) when the accelerometer was worn and follow activity and inactivity patterns. RESULTS: Women with normal BMD spent significantly more hours/day being active than women with osteopenia. On theother hand, women with osteopenia perform significantly more household-related PA. According to the physical inactivity analysis, women with osteopenia spent significantly more minutes/week while doing different mental activities (reading, doing crossword puzzles, etc.) in a sitting position than women with normal BMD. CONCLUSIONS: In conclusion, the results of this study show the differences in physical activity and physical inactivity in women with different femoral BMD. [VYCHODISKA: U postmenopauzálních en je pohybová aktivita d le itá jako prevence úbytku kostní denzity a osteoporózy a p ispívá tak ke sní ování rizika zlomenin. CíLE: Cílem této pr ezové studie bylo zji tění, zda existují rozdíly v habituální pohybové aktivitě, pohybové inaktivitě a v plnění doporu ení k pohybové aktivitě mezi enami s normální femorální denzitou a enami s osteopenií. METODIKA: Z 92 en, jejich vysledky byly zahrnuty do této studie, bylo v pásmu normálních hodnot T-skóre proximálního femuru 72,8 % en a u 27,2 % en dosahovaly hodnoty T-skóre osteopenie. Denzitometrické vy et ení proximálního femuru, stejně tak diagnostika vybranych tělesnych slo ek, byla uskute něna metodou duální rentgenové absorpciometrie (DXA). Sedmidenní pohybová aktivita byla monitorována pomocí p ístroje ActiGraph GT1M. údaje o denních aktivitách a inaktivitách a asu, kdy byl p ístroj no en, byly probandy zapisovány do speciálních záznamovych arch . VYSLEDKY: eny s normální femorální denzitou by

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