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Category: Treadmill

Individualized Ramp Treadmill (14)

This consists of a short, selfadministered progressive series of questions pertaining to activities of daily living. Some example questions are presented in Table 5. Figure 4 illustrates the relationship between MET values achieved on the treadmill and those estimated from the questionnaire. Although the mean MET values did not differ between those achieved on the…

Individualized Ramp Treadmill (13)

Second, the influence of incomplete stages makes the prediction of oxygen uptake from treadmill time or workload somewhat tenuous when using incremental protocols. In the present study, subjects were “credited” with both the predicted and measured oxygen uptake value at the instant the test was terminated. While this alleviates the problem of an incomplete stage,…

Individualized Ramp Treadmill (12)

Maximal Ventilatory vs Maximal Predicted Oxygen Uptake Because of its many clinical applications, the most important concern is the influence of these factors on maximal exercise capacity. Despite the many reports concerning the shortcomings of estimating maximal oxygen uptake, the direct measurement of oxygen uptake using gas exchange techniques remains somewhat limited due to the…

Individualized Ramp Treadmill (11)

Nevertheless, the association between measured and predicted oxygen uptake throughout exercise in the present and previous studies suggests that the ramp test has advantages over other protocols when the need for predicting oxygen uptake exists. Previous studies have noted a disruption of the relation between oxygen uptake and work rate at higher levels of exercise….

Individualized Ramp Treadmill (10)

Predicted vs Measured Vo2 Throughout Exercise The slope of the relationship between measured and predicted oxygen uptake (Figure 2) is an expression of the degree of change in one variable for a given change in another. The ramp test lends itself well to an evaluation of slope since the change in the variable expressed on…

Individualized Ramp Treadmill (9)

At higher ramp rates, however (100 W/min), oxygen kinetics and work efficiency could not be estimated. This finding underscores the value of choosing an individualized ramp rate for each subject. Ramp cycle ergometry, because of the constant increases in work, has intuitive advantages for assessing blood lactate and acid-base relationships during exercise, pharmacologic intervention, and…

Individualized Ramp Treadmill (8)

This duration has been justified on the basis of better reliability for studying the effects of therapy, higher values for maximal oxygen uptake, and an improvement in the relationship between oxygen uptake and work rate compared with shorter protocols employing large work increments. Because a major feature of the ramp test is an individualized change…

Individualized Ramp Treadmill (7)

Maximal METs Calculated from Treadmill Work vs Estimated from Questionnaire Figure 4 illustrates the relationship between exercise capacity, expressed in METs, estimated from a specific activity questionnaire, and that calculated from treadmill speed and grade at peak exercise. The correlation between the 2 was 0.69 (p<0.001), and the regression equation was Y = 0.48X +…

Individualized Ramp Treadmill (6)

Maximal Exercise The mean maximal perceived exertion was 18.9 ± 1.3 and the maximal respiratory exchange ratio was 1.16 ±0.14 (Table 2). These values suggest that maximal exercise was generally achieved for the group. The mean maximal heart rate attained was 168 ±17 which is roughly equal to that expected for age. Maximal oxygen uptake…

Individualized Ramp Treadmill (5)

Statistics Data were entered into a spreadsheet (Quattro Pro) from which means and standard deviations were performed. A program (Statistical Graphics Corporation, Bethesda, Md) was used to compare regression lines between oxygen uptake and work rate. Students t-tests for paired observations were used to evaluate differences between measured and predicted maximal oxygen uptake.

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