Associations of physical activity duration, frequency, and load with volumetric BMD, geometry, and bone strength in young girls.
Associations of physical activity duration, frequency, and load with volumetric BMD, geometry, and bone strength in young girls.
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DOI：
10.1007/s00198-010-1361-8
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发表时间：
2011-05
影响因子：
4
通讯作者：
Going, S. B.
中科院分区：
文献类型：
--
作者：
Farr, J. N.;Blew, R. M.;Lee, V. R.;Lohman, T. G.;Going, S. B.
本研究评价了年轻女孩体力活动（PA）持续时间、频率、负荷及其相互作用（PA总分=持续时间×频率×负荷）与体积骨密度、几何形状和骨强度指数的关系。465名8-13岁女生完成了过去一年的身体活动问卷（PYPAQ），询问了闲暇时间PA和运动的频率（天/周）和持续时间（平均分钟/节）。根据地面反作用力，为每项活动分配负荷（峰值应变评分）值。外周定量计算机断层扫描用于评估非优势腿股骨和胫骨干骺端和骨干部位的骨参数。在所有骨骼部位，PA持续时间、频率、负荷和骨膜周长（PC）、骨强度指数（BSI）和强度-应变指数（SSI）之间的相关性显著（p ≤ 0.05），但较低（0.10-0.17）。所有骨骼部位的PC高2.7-3.7%与PYPAQ评分高相关，而PYPAQ评分低。此外，高PYPAQ评分与股骨和胫骨干骺端部位的BSI（6.5-8.7%）和SSI（7.5-8.1%）相关。低PYPAQ评分对骨几何参数和强度的影响大于高PYPAQ评分。PA持续时间、频率和负荷都与骨几何形状和强度相关，尽管它们的独立影响是适度的和部位特异性的。低水平的PA可能会损害骨骼发育，而高水平的PA仅比更平均的水平有很小的益处。
This study evaluated the associations of physical activity (PA) duration, frequency, load, and their interaction (total PA score = duration × frequency × load) with volumetric bone mineral density, geometry, and indices of bone strength in young girls. 465 girls (aged 8–13 years) completed a past year physical activity questionnaire (PYPAQ) which inquires about the frequency (days/week) and duration (average minutes/session) of leisure-time PA and sports. Load (peak strain score) values were assigned to each activity based on ground reaction forces. Peripheral quantitative computed tomography was used to assess bone parameters at metaphyseal and diaphyseal sites of the femur and tibia of the non-dominant leg. Correlations across all skeletal sites between PA duration, frequency, load and periosteal circumference (PC), bone strength index (BSI), and strength-strain index (SSI) were significant (p ≤ 0.05), although low (0.10–0.17). A 2.7–3.7% greater PC across all skeletal sites was associated with a high compared to a low PYPAQ score. Also, a high PYPAQ score was associated with greater BSI (6.5–8.7%) at metaphyseal sites and SSI (7.5–8.1%) at diaphyseal sites of the femur and tibia. The effect of a low PYPAQ score on bone geometric parameters and strength was greater than a high PYPAQ score. PA duration, frequency, and load were all associated with bone geometry and strength, although their independent influences were modest and site specific. Low levels of PA may compromise bone development whereas high levels have only a small benefit over more average levels.
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DOI：
10.1186/1479-5868-5-45
发表时间：
2008-09-10
影响因子：
8.7
作者：
Ridley, Kate;Ainsworth, Barbara E.;Olds, Tim S.
通讯作者：
Olds, Tim S.
影响因子：
4.1
作者：
Karlsson, MK;Magnusson, H;Seeman, E
通讯作者：
Seeman, E
影响因子：
6.2
作者：
Hsieh, YF;Turner, CH
通讯作者：
Turner, CH
影响因子：
6.2
作者：
Bass, SL;Saxon, L;Stuckey, S
通讯作者：
Stuckey, S
DOI：
10.2106/00004623-198466030-00012
发表时间：
1984-01-01
影响因子：
5.3
作者：
RUBIN, CT;LANYON, LE
通讯作者：
LANYON, LE