Sensory and Motor System Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongou, Bunkyouku, Tokyo, 113-0033, Japan.
Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, 359-1192, Japan.
J Bone Miner Metab. 2020 May;38(3):338-345. doi: 10.1007/s00774-019-01060-6. Epub 2019 Nov 7.
Previous studies have reported that the peak in lean body mass (LBM) precedes the peak in bone mineral content (BMC). However, it is unknown whether the trunk region growth is similar.
We investigated the difference between pubertal peak age in the increase of LBM in the trunk (trunk LBM) and pubertal peak age in the increase of BMC in the lumbar spine (lumbar BMC) in a longitudinal study of 201 Japanese male adolescent soccer players. The age of peak height velocity (PHV) and the developmental age were calculated. The participants were followed over a 2-year period, with height and dual-energy X-ray absorptiometry scans taken every 6 months.
The trunk LBM (ρ = 0.732, p < 0.0001) and the lumbar BMC (ρ = 0.621, p < 0.0001) significantly correlated with the developmental age. The increase of trunk LBM and lumbar BMC was significantly different according to the developmental stages (Kruskal-Wallis test; p < 0.0001 and p < 0.001, respectively). We used a cubic spline to estimate the developmental age, when the increase reached its peak: the peak age of the increase in trunk LBM was estimated to be - 0.08 years (approximately - 1 month) prior to PHV age, whereas the peak age of the increase in lumbar BMC was estimated to be 0.42 years (approximately 5 months) after the PHV age.
The maximal increase in trunk LBM occurs just before PHV age and approximately 6 months before the maximal increase in lumbar BMC during the pubertal growth spurt in the Japanese adolescent male soccer players.
之前的研究报告称，瘦体重（LBM）峰值先于骨矿物质含量（BMC）峰值出现。然而，目前尚不清楚躯干区域的生长是否相似。
我们在一项对 201 名日本男性青少年足球运动员的纵向研究中，研究了躯干 LBM 增加的青春期峰值年龄（躯干 LBM）与腰椎 BMC 增加的青春期峰值年龄（腰椎 BMC）之间的差异。计算了身高突增高峰年龄（PHV）和发育年龄。参与者在 2 年内接受随访，每 6 个月进行一次身高和双能 X 射线吸收法扫描。
躯干 LBM（ρ=0.732，p<0.0001）和腰椎 BMC（ρ=0.621，p<0.0001）与发育年龄显著相关。根据发育阶段，躯干 LBM 和腰椎 BMC 的增加有显著差异（Kruskal-Wallis 检验；p<0.0001 和 p<0.001）。我们使用三次样条估计发育年龄，当增加达到峰值时：躯干 LBM 增加的峰值年龄估计比 PHV 年龄提前-0.08 岁（约-1 个月），而腰椎 BMC 增加的峰值年龄估计比 PHV 年龄晚 0.42 岁（约 5 个月）。
在日本青少年男性足球运动员青春期生长突增期间，躯干 LBM 的最大增加发生在 PHV 年龄之前，大约在腰椎 BMC 的最大增加之前 6 个月。
