The purposes of this study were to 1.) evaluate physiologic, metabolic, and perceptual responses to submaximal exercise on a total body recumbent stepper(NUSTEP ™), 2.) assess work load reliability, 3.) compare predicted vs. measured total calories (TOT KCAL), and 4.) determine and validate the regression equations for VO2, heart rate (HR), and TOT KCAL. Fifty adults (18-35 yr) were randomly assigned to the experimental (EXP, N=30) and validation (VAL, N=20) groups. Subjects exercised arms and legs simultaneously at 100 steps/min. Following the familiarization trials, EXP subjects were randomly assigned to one of two experimental trials (T1 = levels 1,3,5,7; T2 = levels 2,4,6,8). Subjects performed each level until they achieved steady state (VO2 ≤ 150 ml between two consecutive 30 s readings). HR, differentiated ratings of perceived exertion (RPE), and blood pressure were also recorded. Fifteen EXP subjects performed retest trials. VAL subjects performed a single, steady-state trial at a randomly assigned work load, exercising for four min at steady state. Pearson product-moment and interclass correlation coefficients as well as simple regressions were calculated. Validation procedures consisted of applying the regression equations derived from EXP data to the independent VAL group. The authors concluded: 1.) submaximal exercise using the present ergometer elicited expected physiologic, respiratory-metabolic, and perceptual responses, 2.) the total body recumbent stepper was reliable (r =.93 to.99, p≤.002), 3.) predicted vs.measured TOT KCAL were highly correlated (r =.98,p≤.0001), and 4.) VO2 (ml/kg/min) and (l/min), HR, and TOT KCAL can be predicted for the work loads (r =.95,.92,.90,.97,p≤.005, respectively).
H-18 POSTER NOVEL MODES OF EXERCISE