The objective of the study was to examine the validity and reliability of the Cantonese-translated version (Leung et al., 2004) of the Borg's Rating of Perceived Exertion (RPE) scale as a method of reproducing exercise intensity during discontinuous intermittent cycle ergometry. The Borg 6-20 RPE scale was first translated into Cantonese and the translation process was based on the work by Brislin (1970). A total of thirty five 21.4 ± 3.9 year-old participants (18 males and 17 females) volunteered to participate in the study. Each participant underwent two trials of identical testing on a Monark cycle ergometer seven days apart to assess reliability. On both occasions, the participants produced five three-min exercise intensities at RPE levels 7, 10, 13, 16, and 19. The testing was a discontinuous intermittent protocol with intensity levels being randomly assigned to each participant and two-min rest periods were interspersed between each intensity level. Objective measures of exercise intensity (heart rate and power output) were obtained at the end of each intensity level. Significant (p < .05) Pearson correlations were found between subjective perceived effort rating levels and objective measures of exercise intensity: heart rate (rs > .79) and power output (rs > .81). High test-retest intraclass coefficients (Rs > .91) reflected that the reliability in reproducing exercise intensity between trials was satisfactory. To conclude, the Cantonese version of the RPE scale appears to be valid and reliable for exercise intensity reproduction during controlled cycle ergometry exercises. Further investigations into the usefulness and applicability of this Cantonese RPE scale in physical education classes beyond laboratory settings are warranted. Keyword(s): exercise/fitness/physical activity, measurement/evaluation, motor skills