Differences of Bone Mineral Density by Characteristics of Sports in Amenorrheic Athletes
Int J Sports Med DOI: 10.1055/a-2161-5668Hypothalamic amenorrhea leads to a hypoestrogenic state, causing decreased bone
mineral density (BMD), while strong impact loading on bone has been shown to
increase BMD. The purpose of this study is to compare BMD in female athletes
based on menstrual status and their sports/events by impact loading
characteristics. BMD at the lumbar spine was measured by dual-energy X-ray
absorptiometry and hormone level. The subjects were classified into four groups
and BMD and hormone levels were compared among the four groups, which were
divided into amenorrheic athletes (AAs) and eumenorrheic athletes (EAs). This
study recruited 410 female athletes (164 in the AAs and 246 in the EAs), 55
athletes in non-impact sports, 123 in low-impact sports, 141 in multidirectional
sports, and 91 in high-impact sports. In the AAs group, BMD Z-score was lowest
in low-impact sports (Z-score: –1.53 [–1.76, –1.30]),
and was highest in high-impact sports (Z-score: 0.02 [–0.34, 0.38]). In
multidirectional and high-impact sports, BMD Z-score in the AAs group did not
show results lower than the average for non-athletes. When screening female
athletes for low BMD, it is important to evaluate the risk of low BMD based on
the impact loading characteristics of their sports/events, in addition
to th...
Source: International Journal of Sports Medicine - Category: Sports Medicine Authors: Nose-Ogura, Sayaka Yoshino, Osamu Kinoshita, Sakiko Nakamura, Hiroe Harada, Miyuki Hiraike, Osamu Osuga, Yutaka Dohi, Michiko Nakajima, Kohei Kawahara, Takashi Tags: Orthopedics & Biomechanics Source Type: research