Department of Nutrition and Health Sciences, Human Performance Laboratory, University of Nebraska-Lincoln, Lincoln, Nebraska, USA.
J Strength Cond Res. 2010 Sep;24(9):2358-65. doi: 10.1519/JSC.0b013e3181aff2a2.
The purposes of the present study were to determine the patterns of age-related changes in 1) height (HT), body weight (BW), fat-free weight (FFW), and absolute isokinetic peak torque (PT); and 2) isokinetic PT covaried separately for HT, BW, FFW, and HT and BW combined in young wrestlers. One hundred twenty-five male wrestlers (mean age +/- SD = 14.3 +/- 2.4 yr; range = 11.1-18.2 yr) volunteered to perform concentric, isokinetic leg extension and flexion at 180 degrees xs-1 on a Cybex II dynamometer to measure PT as well as underwater weighing to determine FFW. The polynomial regression analyses indicated there were significant quadratic increases across age for HT (R = 0.62), BW (R = 0.56), and FFW (R = 0.47). For leg extension, there were significant increases across age for absolute PT (quadratic, R = 0.66), PT covaried for HT (linear, r = 0.10), PT covaried for BW (linear, r = 0.12), PT covaried for FFW (quadratic, R = 0.32), and PT covaried for HT and BW combined (quadratic, R = 0.11). For leg flexion, there were significant increases across age for absolute PT (linear, r = 0.59), PT covaried for HT (linear, r = 0.07), PT covaried for BW (linear, r = 0.08), PT covaried for FFW (quadratic, R = 0.23), and PT covaried for BW and HT combined (linear, r = 0.03). The results of this study indicated that age-related increases in leg-extension and flexion PT for the current sample of young wrestlers could not be accounted for by changes in HT, BW, FFW, or HT and BW combined. These findings suggested that neural maturation may contribute to increases in leg strength across age in young wrestlers.
本研究的目的是确定 1）身高（HT）、体重（BW）、去脂体重（FFW）和绝对等速峰值扭矩（PT）的年龄相关变化模式；2）在年轻摔跤手中，分别针对 HT、BW、FFW 以及 HT 和 BW 组合对等速 PT 进行协变。125 名男性摔跤手（平均年龄 +/- SD = 14.3 +/- 2.4 岁；范围= 11.1-18.2 岁）自愿在 Cybex II 测力计上进行 180 度 xs-1 的向心等速腿部伸展和弯曲运动，以测量 PT 并进行水下称重以确定 FFW。多项式回归分析表明，HT（R = 0.62）、BW（R = 0.56）和 FFW（R = 0.47）的年龄呈显著二次增加。对于腿部伸展，绝对 PT（二次，R = 0.66）、与 HT 协变的 PT（线性，r = 0.10）、与 BW 协变的 PT（线性，r = 0.12）、与 FFW 协变的 PT（二次，R = 0.32）和与 HT 和 BW 结合协变的 PT（二次，R = 0.11）的年龄呈显著增加。对于腿部弯曲，绝对 PT（线性，r = 0.59）、与 HT 协变的 PT（线性，r = 0.07）、与 BW 协变的 PT（线性，r = 0.08）、与 FFW 协变的 PT（二次，R = 0.23）和与 BW 和 HT 结合协变的 PT（线性，r = 0.03）的年龄呈显著增加。本研究结果表明，当前年轻摔跤手样本中腿部伸展和弯曲等速 PT 的年龄相关增加不能归因于 HT、BW、FFW 或 HT 和 BW 的组合变化。这些发现表明，神经成熟可能有助于年轻摔跤手在整个年龄段腿部力量的增加。
