香港六合彩开奖结果

Vol. 18 No. 2 (2019)
Original Articles

Racial/ethnic differences in bone mineral density, muscle function and fat mass in young women

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  • Japneet Kaur,
  • Ryan Miller,
  • Eduardo Freitas,
  • Debra Bemben,
  • Michael Bemben
Japneet Kaur
Department of Health and Exercise Science. University of Oklahoma, Norman, Oklahoma, USA.
Ryan Miller
Department of Health and Exercise Science. University of Oklahoma, Norman, Oklahoma, USA.
Eduardo Freitas
Department of Health and Exercise Science. University of Oklahoma, Norman, Oklahoma, USA.
Debra Bemben
Department of Health and Exercise Science. University of Oklahoma, Norman, Oklahoma, USA.
Michael Bemben
Department of Health and Exercise Science. University of Oklahoma, Norman, Oklahoma, USA.
DOI:

Published 2020-01-03

Keywords

  • DXA,
  • Osteoporosis,
  • Body composition,
  • Premenopausal,
  • Lean mass,
  • Muscle strength
    • ...More
    Less

How to Cite

1.
Japneet Kaur, Ryan Miller, Eduardo Freitas, Debra Bemben, Michael Bemben. Racial/ethnic differences in bone mineral density, muscle function and fat mass in young women. BJHBS [Internet]. 2020 Jan. 3 [cited 2024 Oct. 12];18(2):103-1. Available from: /bjhbs/article/view/119

Copyright (c) 2020 香港六合彩开奖结果

This work is licensed under a .

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Abstract

Background: Racial/ethnic differences in bone mineral density (BMD) result in increased susceptibility of some ethnic groups to fragility fractures in comparison to others. Conventionally, both lean mass and fat mass provide mechanical loading to the skeleton and increase BMD, however, increase in fat mass beyond a certain level without a concurrent increase in muscle mass/strength, is detrimental to the skeleton. The aim of this study was to determine racial/ethnic differences in BMD, muscle function and fat mass in 18-30-year-old women of Caucasian, East-Asian, South-Asian, Hispanic and African-American backgrounds. Materials and methods: Forty-six women participated in the study. The visits included signing a written informed consent and questionnaires to assess health status, menstrual history, physical activity and calcium intake. Body composition (fat mass, bone free lean body mass (BFLBM), and bone mineral content (BMC)) and total and regional BMD were measured using Dual Energy X-Ray Absorptiometry, while handgrip test, jump test, 1Repetition-Maximum leg press test, and bilateral isokinetic testing of knee flexors and extensors were used to quantify lower limb muscle strength and power. Results: African-American women had a higher BMD at the left and right trochanter (p=0.03) and higher BMC at several sites in comparison to South-Asians (p=0.02) and Hispanics (p=0.03). South-Asian women had a higher fat mass (p=0.04) and percent body fat (p=0.003), and lower BFLBM (p=0.04) and strength (p=0.003) than East-Asians and Caucasians. Conclusion: This type of research is essential to identify at-risk minorities and fundamental for creating awareness, developing ethnicity-specific diagnostic criteria, and preventative and therapeutic strategies.

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