Regulating intensity using perceived exertion: effect of exercise duration

Abstract

To examine whether the validity of perception-based intensity regulation would be affected by exercise duration, 20 subjects were recruited to complete a maximal exercise test (GXT) and four submaximal trials of varying duration and intensity using a cyle ergometer. During GXT, ratings of perceived exertion (RPE), oxygen uptake VO2, heart rate (HR), and power output (PO) equivalent to 50 and 75% VO2peak were determined. During each trial, subjects were to produce and maintain a workload using RPE estimated at 50 or 75% VO2peak for 20 or 40 min, and VO2, HR, and PO were measured throughout the exercise. No differences in average VO(2) were found between the estimation and production trial of either duration. However, average HR and PO were lower (P < 0.05) during the production trial of both durations. It appears that exercise duration has a minimal impact upon the accuracy of using RPE to regulate a target metabolic demand.

Validity of the Borg 6–20 categories obtegories obtained in incremental testing for prescribing aerobic exercise intensity: a systematic review

“…A total of 1434 references were found. After applying the criteria established as guiding criteria for inclusion, 15 studies were considered eligible for review [19][20][21][22][23][24][25][26][27][28][33][34][35][36][37]. the description of article selection Human Movement, Vol.…”

“…In contrast to these findings, Marriott and Lamb [24] demonstrated that self-regulation with categories 11, 13, 15, and 19 of this RPE scale was associated with different HR and power measurements on a cycle ergometer. Similarly, Kang et al [23] observed differences in comparisons of these measures in exercise sessions lasting 20 and 40 minutes for performing exercise at self-regulated intensity in categories related to 50% and 75% of O 2 peak. to this same end, other research has tested the validity of self-regulation exercise intensity with the Borg 6-20 scale by comparing perceptually regulated prescriptions with conventional prescriptions regulated by HR, ergometer power, and treadmill speed [26][27][28].…”

“…In contrast, other research has shown that the Borg 6-20 scale can be an effective tool in prescribing exercise in the treatment of pathologies such as diabetes mellitus [10], Parkinson's disease [11], heart disease [12][13][14][15][16][17], and cancer [18]. the literature also presents some studies that have tested the accuracy of Borg categories 6-20 obtained in graded tests for exercise intensity prescription by comparing measures such as heart rate (HR), oxygen consumption ( O 2 ), and cycle ergometer power generated in incremental exercise tests with measures obtained in intensity prescriptions determined by RPE [19][20][21][22][23][24][25]. Dunbar et al [19] and Kang et al [22], respectively, observed that self-regulated exercise performed on a treadmill and cycle ergometer with Borg 6-20 categories equivalent to 50% of O 2 peak, and 50% and 70% of O 2 peak showed no significant differences for measures of O 2 , HR, and power compared with the values reported in the incremental stress test.…”

Validación inicial de la escala de medición de esfuerzo percibido infantil (EPInfant) en niños chilenos

“…La escala de Borg se ha utilizado en diversos contextos como herramienta para cuantificar el esfuerzo percibido y para reproducir la intensidad del ejercicio (4)(5)(6)(7). En este modelo se observa que, a medida que la intensidad del ejercicio crece de forma constante, también aumenta la percepción del esfuerzo asociado al estrés fisiológico en respuesta a la intensidad progresiva del trabajo, lo que evidencia la correlación positiva entre ambas variables (1,8).…”

Development and assessment of EPInfant: a rating scale of perceived exertion for the pediatric population

“…[4][5][6] A c c o r d i n g t o B o r g ' s m o d e l , a s exercise intensity increases, PE increases accordingly in response to progressive activity intensities, which demonstrates a positive correlation between both outcome measures. [1][2][3][4][5][6][7][8] However, since children's cognitive development is not sufficient to understand numerical descriptors of physiological stress used for adults, 8 it is necessary to develop scales especially designed for the pediatric population with characteristics expressing levels of physiological stress during exercise in a particular manner. [9][10][11][12][13] Several instruments have been developed that have shown an acceptable performance in children and adolescents of different age groups and cultures.…”