摘要
目的和方法：用连续心率监测和气体分析的方法测量了１５名１２岁男孩，在分别负载相当於他们体重１０％，１５％和２０％重的书包，并以不背书包为对照的情况下，以１．１ｍ／ｓ的速度步行２０ｍｉｎ中，停止步行后３ｍｉｎ和５ｍｉｎ的心率、能量消耗和人体工作强度（％最大摄氧量）的变化。受试者的血压亦在步行前，步行后即刻、３ｍｉｎ和５ｍｉｎ予以测量。结果：当受试者负载２０％体重书包行走至５ｍｉｎ时，其能量消耗，摄氧量的变化和相对工作强度较负重０％、１０％和１５％体重行走有显著性差异。
Aim and
Methods: Fifteen male children, aged 12, were selected from a primary school to carry school
bags of 10%,15% and 20% of their own body wieghts, and no load, i.e. 0%, was used as control.
VO 2max was measured on a motorized treadmill using a continuous incremental protocol.
In the load carriage test, subjects walked at 1.1 m/s for 20 minutes on the treadmill. Heart rate
and the air exhaled were recorded with a cardiopulmonary function system before, throughout
and until five min after the walk. Results: A significant difference in energy consumption,
oxygen uptake and exercise intensity in carrying 20% body weight load than 0%, 10% and 15%
body weight load from 5 min after starting walk had been found.
出处
《中国应用生理学杂志》
CAS
CSCD
1999年第2期137-140,共4页
Chinese Journal of Applied Physiology
关键词
书包
负重
心血管反应
能量代谢
儿童
school bag
weight load
cardiovascular respoinse
energy metabolism
