摘 要

連續長時間（30－60分鐘）的有氧運動對於大部分的人來說是體力上的一大考驗；從文獻中發現，將每天的運動時間分段累積亦同樣有促進心肺適能的效果。本研究目的在探討八週不同強度的分散式跑走運動對國中男生心肺適能的影響。本研究以30名國中男生(平均年齡為14.2±0.4歲，平均最大攝氧量為46.88±5.15ml/kg/min)作為受試對象，以隨機分組方式分為中強度（60%VO2R）分散式運動組、低強度（40%VO2R）分散式跑步運動組及控制組。中強度及低強度分散式運動組除體育課外，進行每週3天，每個運動天分為早晚2次15分鐘跑走運動，控制組除體育課外，不從事任何運動。八週運動前後皆進行最大攝氧量測量，所得資料則以重複量數t 考驗比較運動訓練前、後各組內之各項變數；各組受試者基本資料之間都以單因子獨立樣本變異數分析比較，並以杜凱法進行事後比較。結果發現如下：中強度運動組可以達到安靜心跳率明顯下降(p<.05)、運動持續時間增加(p<.05)及最大攝氧量相對值增加(p<.05)。低強度運動組的安靜心跳率明顯下降(p<.05)；但是對於運動持續時間及最大攝氧量相對值的提昇並沒有明顯的影響。三組的最大心跳率並沒有因為運動介入而明顯改變。三組最大換氣量前後測均有增加，且達顯著差異(p<.05)。由以上得到結論：以中強度分散式運動方式能有效改善青少年之心肺適能；而低強度分散式運動方式僅能達到維持心肺適能的效果。

Abstract

It’s a challenge for many people to do continuous aerobic exercise lasting 30-60 minutes one bout. According to researches, we found that : accumulating time of separate exercise also has the effects on cardiopulmonary fitness. The purpose of this study was to examine the effects of eight-week different intensity run-walk exercise on cardiopulmonary fitness in junior high school boy students. Method: Thirty adolescents (age=14.2±0.4 yrs, VO2max=46.88±5.15 ml/kg/min) were recruited as the subjects for this study. They were divided into three different groups at random: middle intensity（60%VO2R）discontinuous exercise group (MDG), low intensity（40%VO2R）discontinuous exercise group (LDG) and control group (CG). MDG and LDG performed two bouts of run-walk exercise lasting for 15 minutes every time (three times/week, 8weeks). CG did not do any exercise except PE classes. Their VO2max were measured after 8-weeks. Data obtained before and after the test were analyzed through SAS statistic software. One - way ANOVA was used to analyze the different intensity of exercise. Paired t test and Tukey post hoct – comparison were used to analyze data if there was a significant difference. Results: 1) MDG improved in VO2max, and treadmill running performance (p<.05), and HRrest was decreased . 2) LDG decreased in HRrest (p<.05)but there is no significant influence in VO2max and treadmill running performance. 3) All of the three groups had significant increase in VEmax, but there is no difference in HRmax. Conclusions: middle intensity discontinuous run-walk exercise has the effects improving the cardiopulmonary fitness in adolescents, but low intensity discontinuous run-walk exercise only has the effects to maintain cardiopulmonary fitness .

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