摘要：Al-Rahamneh H. Measuring Peak Oxygen Uptake using Perceptually-Regulated Exercise Test in Arm Cranking Exercise. JEPonline 2019;22(7):120-129. The purpose of the current study was to assess: (a) the validity of measuring VO2 peak using the PRETmax during arm cranking exercise; and (b) whether there was a difference in the affect between the GXT and PRET max. Fifteen subjects (27.7 ± 4.7 yrs; 177 ± 6 cm; 79.9 ± 12.7 kg) volunteered to participate in this study. After a familiarization trial, each subject completed two exercise tests: (a) the GXT to measure VO2 peak; and (b) the PRET to measure VO2 peak and to compare the VO2 peak values with those elicited during the GXT. The GXT started at 30 W and increased 15 W every 2 min until volitional exhaustion; whereas, the PRET max participants were asked to exercise at 6 stages of the Borg 6 to 20 RPE scale (RPE9, 11, 13, 15, 17, & 20) with 3 min each. Paired sample t-test showed no significant difference between the GXT and PRET in the peak values of VO2 (27 ± 6 mL∙kg-1 ∙min-1 and 25 ± 6 mL∙kg-1 ∙min-1 , P = 0.100, respectively), power output (114 ± 23 W and 109 ± 26 W, P = 0.210, respectively), RER and affect state. However, peak HR (159 ± 22 b∙min-1 and 144 ± 18 b∙min-1 , P = 0.004, respectively) and VE (109 ± 32 and 97 ± 34, P = 0.033, respectively) values were significantly higher during the GXT compared to the PRET max. The PRET max can be used as an alternative way of measuring VO2 peak especially when relating energy expenditure to perceptual responses. The subjects rated the PRET max to be less negative, although not significant, compared to the GXT.
