Bunc V, Winterová J
Sportovní výzkumné centrum Fakulty tĕlesné výchovy a sportu UK, Praha.
Cas Lek Cesk. 1994 Apr 4;133(7):206-8.
For requirements of physical rehabilitation it is important to know the "safe" load intensity: this can be assessed reliably among others on a pedalling ergometer. The purpose of the present work was to reveal conversion relations between laboratory loads on a pedalling ergometer and the load of walking which is the most natural physical activity recommended for keeping fit and for rehabilitation, incl. rehabilitation of patients with ischaemic heart disease, after cardiosurgery etc.
In order to obtain conversion relations between the load intensity on a pedalling ergometer and walking on a treadmill, on the same day a group of 40 men (mean age 51.0 +/- 5.0 years, body weight 83.7 +/- 9.9 kg, height 175.3 +/- 5.8 cm and mean body fat 18.6 +/- 4.0%) were subjected to both types of exercise. All patients were for varying periods after a myocardial infarction or revascularization surgery (aortocoronary bypass type) and had different load tolerances. From the functional aspect they belonged into group NYHA I: On a single day thy were subjected to examination on a pedalling ergometer with a load of 0.75, 1.25, 1.75 W.kg-1 and on a treadmill, 0 gradient, at a rate of 3.5 and 7 km.h-1. Assuming a linear relationship between load intensity and oxygen consumption a simple relationship is found between the rate of walking in km.hour-1 and the pedalling intensity P/W.kg-1, i.e. v = 3.051 x P + 1.361. This relationship can be used for conversion of load intensities from the bicycle to walking on a treadmill or on even ground up to intensities of a pedalling load 1.75 W.kg-1 and walking at a rate of 7 km.h-1 with an error less than 10%.
The authors elaborated a mathematically expressed general relation for conversion of the load intensity on a pedalling ergometer to walking on even ground.
出于身体康复的需求，了解“安全”负荷强度很重要：这可以在踏车测力计等设备上可靠地进行评估。本研究的目的是揭示踏车测力计上的实验室负荷与步行负荷之间的转换关系，步行是最自然的身体活动，推荐用于健身和康复，包括缺血性心脏病患者、心脏手术后等的康复。
为了获得踏车测力计上的负荷强度与跑步机上步行之间的转换关系，同一天对一组40名男性（平均年龄51.0±5.0岁，体重83.7±9.9千克，身高175.3±5.8厘米，平均体脂18.6±4.0%）进行了这两种运动。所有患者均处于心肌梗死或血管重建手术（主动脉冠状动脉搭桥术类型）后的不同时期，且负荷耐受性不同。从功能方面来看，他们属于纽约心脏协会I级：同一天，他们在踏车测力计上接受了负荷为0.75、1.25、1.75瓦·千克⁻¹的检查，在跑步机上，坡度为0，速度为3.5和7千米·小时⁻¹。假设负荷强度与耗氧量之间存在线性关系，则可发现千米·小时⁻¹的步行速度与踏蹬强度P/瓦·千克⁻¹之间存在简单关系，即v = 3.051×P + 1.361。这种关系可用于将负荷强度从自行车转换为跑步机或平地上的步行，直至踏蹬负荷强度为1.75瓦·千克⁻¹且步行速度为7千米·小时⁻¹，误差小于10%。
作者阐述了一种数学表达式的通用关系，用于将踏车测力计上的负荷强度转换为平地上的步行负荷。
