Abstract

Background

Data relating physical performance to the timing of the adolescent growth spurt are limited. Aim: This study identifies: (i) age-at-peak height velocity (APHV), (ii) physical performance spurt patterns aligned to APHV; and (iii) cross-cultural and time patterns in Canadian, Brazilian and Portuguese boys. Subjects and methods: A total of 512 boys (131 Canadian, 250 Portuguese and 131 Brazilian), 8–17 years of age were followed serially using longitudinal data. APHV was identified and five physical performance measures velocities [trunk extension (TE), trunk flexion (TF), standing long jump (SLJ), curl-ups (CU) and handgrip strength (HG)] were aligned at 6-month intervals, 4 years around the attainment of PHV. Velocities were estimated using a non-smooth mathematical procedure. Results: APHV was 13.9 ± 1.0, 13.4 ± 1.6 and 13.0 ± 0.8 years for Canadian, Brazilian and Portuguese boys, respectively. Maximal velocity in SLJ was attained between 12 and 6 months prior to PHV. For HG, peaks were attained 12–24 months after PHV. Maximal velocity in TE occurred between 12 and 0 months prior to PHV, while CU peaked between PHV and 6 months after PHV. Conclusion: Patterns of spurts in physical performance have remained relatively the same and do not appear to be influenced by cross-cultural differences.

中文翻译：

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青春期的身体表现模式突飞猛进：对加拿大，巴西和葡萄牙男孩的跨文化研究

摘要

背景

有关身体表现与青春期增长突增时间的数据有限。目的：这项研究确定：（i）峰高速度（APHV），（ii）与APHV一致的身体表现突增模式；（iii）加拿大，巴西和葡萄牙男孩的跨文化和时间模式。受试者和方法：总共采用纵向数据对8至17岁的512名男孩（131名加拿大人，250名葡萄牙人和131名巴西人）进行了追踪。确定了APHV，并在6个月的间隔内对齐了五项物理性能测量速度[躯干伸展（TE），躯干屈曲（TF），站立跳远（SLJ），弯举（CU）和握力（HG）]，获得PHV大约需要4年的时间。使用非平滑的数学过程来估算速度。结果：加拿大，巴西和葡萄牙男孩的APHV分别为13.9±1.0、13.4±1.6和13.0±0.8岁。在PHV之前的12至6个月内，SLJ达到了最大速度。对于HG，PHV后12-24个月达到峰值。TE的最大速度发生在PHV前12至0个月之间，而CU在PHV至PHV后6个月之间达到峰值。结论：身体表现的突增模式保持相对不变，似乎不受跨文化差异的影响。