Abstract des Autors

The objective of this investigation was to develop a regression equation to predict arm VO2max based on a submaximal arm ergometer exercise. Sixty healthy adult males, from 18 to 29 years of age, completed a symptom-limited/exhaustive exercise test on a Monark Rehab Trainer (Model 881E) to measure arm VO2max. During the arm crank GXT, a subject exercised at an initial work rate of 30 kg m/min, with 30 kg m/min increase in work rate each minute until the subject expressed exhaustion. Subjects also completed a 5-min submaximal exercise on a Monark Rehab Trainer at a work rate that elicited a steady state heart rate between 110 and 150 bpm. This exercise session was preceded by a 3-min warm-up at a work rate at 30 kg m/min. Multiple regression analysis to predict arm VO2max (ml/min) yielded the following predictor variables: (a) submaximal heart rate (SHR) (bpm); (b) submaximal exercise work rate (WR) (kg m/min); (c) body weight (BW) (kg); and (d) age (yr). This analysis produced the following regression equation (N=60): VO2max = -1461.22 + (10.65 WT) + (1.45 WR) + (8.25 SHR) + (47.28 AGE). Pearson's correlation established the relationship between measured and predicted arm VO2max to be r=0.76. The standard error of the estimate (SEE), an indicator of the predictive accuracy of the measurement, was 250.85 ml/min, or 11.53% of measured VO2max (2174.1+/-383.5 ml/min) and predicted VO2max (2174.1+/-290.1 ml/min). The reliability of the regression equation to predict arm VO2max based on submaximal arm exercise was determined by randomly selecting a subsection of the original population (n=20) to participate in a second submaximal exercise prediction 1 week after completing the study. Arm VO2max was predicted again following the same submaximal protocol used in the original study. The results of the intraclass correlation between predicted VO2max on the first trial and the second trial were significant (r=0.81). Verf.-Referat