本研究的目的在於探討運動負荷與運動持續時間之關係，並以此應用於日常運動中，能在安全的前提下從事運動。本研究共有6位年輕男性受試者參與（年齡24.2±1.7歲、身高173.8±6.6公分、體重66±6.9公斤）。所有的受試者需先測量安靜生理值（安靜時耗氧量、安靜時心跳率）、最大生理值（最大耗氧量與最大心跳率）及最大耗氧量跑步速度。之後再分別進行個人最大耗氧量跑步速度的70％、60％、50％、40％、30％及20％六個固定運動強度之運動。實驗中將連續測量運動時之耗氧量與心跳率；而將此以相對負荷（相對耗氧量與相對心跳率）來表示運動負荷，並以心跳率（超過平均運動心跳率10beats/min）來判斷運動持續時間。 實驗所得到的數據，以非線性迴歸進行統計分析得到結果如下：RHR = 18.35 + 61.67e[fed2]□□[fed5][fec1][feb4]□：；RVO[feaf] = 10.16 + 62.92[fed2]□□[feb4][feb6][fed5]□。如果將本研究之回歸模式應用於30分鐘的運動時間，則RHR=68.5％；RVO[feaf]=65.3％為最適合的運動負荷強度。運動者可設定想要運動的時間配合本結果之運動負荷，使得人們能在安全的前提下從事運動。

The purpose of this study was to discuss the relationship between loadings and duration in sports, and applied it to daily exercise in order to premise safety conditions. There were 6young men (age 24.2 year ± 1.7 year, height 173.8 cm ± 6.6cm, weight 66 kg ± 6.9 kg) to participate this study. All participations in advance had to measure the resting physiological value (VO(feaf)rest, HRrest), maximum physiological value (VO(feaf)max, HRmax) and the maximum running velocity at VO(feaf)max. Then, we exerted 6 fixed intensity of personal VO(feaf)max in 70%, 60%, 50%, 40%, 30%, and 20%. During this experience, we measured VO(feaf) and HR continuously in exercise. We used them to be loadings by relative loadings, and we judged duration time by HR. The data from this experience were analyzed by non-linear regression, and the results as follow: HR=18.35+61.67e□; RVO(feaf)=10.16+62.92e□. If we apply this result to 30 minutes exercise, then the RHR=68.5% and the RVO(feaf)=65.3% are the fittest loadings. Therefore, people can set the exercise time they want to fit the loadings of this study in order to premise safety when they are in exercise.