Perceived Exertion at Ventilatory Breakpoint in Adult Females and Males Using the OMNI-Cycle RPE Scale

Abstract

0822 Identification of a standardized rating of perceived exertion (RPE) zone equivalent to the ventilatory breakpoint (Vpt) can be useful for both prescription and self-regulation of aerobic exercise intensity. Such an RPE zone has been identified using the Borg (6–20) Scale. Similar evidence is not available for the OMNI Picture System to measure RPE. PURPOSE: The purpose of the study was to identify a standardized RPE zone equivalent to the ventilatory breakpoint using both the OMNI-Cycle Perceived Exertion Scale and the Borg 6–20 Scale in young adult females and males who varied in physical activity level. METHODS: The participants consisted of 13 females and 19 males, aged 25–29 years. During a graded exercise test (2 minute stages) on a cycle ergometer, RPE for the overall body was measured using both the OMNI-Cycle Scale (0–10) and the Borg Scale (6–20). Borg Scale Ratings were obtained during the first minute of each stage and OMNI Scale ratings during the second minute. Heart rate, blood pressure, ventilation and oxygen consumption were measured during the exercise test, and Vpt was calculated (%VO2peak). RESULTS: The mean VO2peak for females was 29.9 ± 8.7 ml/kg/min, and the mean VO2peak for males was 33.8 ± 6.3 ml/kg/min. The mean Vpt for females was 70.5%VO2peak, and the mean Vpt for males was 70.1%VO2peak. The mean RPE at Vpt was 6.1 ± 1.3 based on the OMNI Scale and 14 ± 1.5 based on the Borg Scale. RPE at the Vpt measured by both the OMNI and Borg Scales did not differ between genders. CONCLUSION: The results support the use of a standardized RPE zone as an indicator of the ventilatory breakpoint in young healthy female and male adults using the OMNI-Cycle Perceived Exertion Scale.