Abstract

BATISTA, D. R. et al. Acute physiological and affective responses in postmenopausal women during prescribed and self-selected aerobic exercise. CPD [online]. 2019, vol.19, n.2, pp.28-38.  Epub July 13, 2020. ISSN 1989-5879.

Few elderly meet current physical activity (PA) guidelines. The limitations for PA adherence is due the barriers found such as displeasure, discomfort, pain and sense of exhaustion. Self-selected exercise has been strategy for PA adherence, due greatest tolerance by aerobic exercise practitioners. The aim of this study was investigate physiological and psychological responses in prescribed and self-selected aerobic sessions in postmenopausal women. It was recruited 30 women active. The study consisted 3 moments: familiarization, self-selected, prescribed sessions. The intensity of self-selected session was replicated in prescribed session. The normality and homogeneity of the variances were verified using the Shapiro-Wilk and Levene tests, respectively a repeated measures analysis of variance (ANOVA) was used to compare HR, SD1, FS, RPE 6-20, time effect (5, 10, 15, and 20 min) x two sessions (Self-selected and Prescribed). The magnitudes of these differences were examined using the standardized difference based on Cohen’s d units by means of effect sizes (d). There was significant main effect of the time for heart rate (HR) (p=.047), FS (p=.009) and Borg scale (p=.012). Session by time interaction the significant main effect in HR (p<.001). Significant mean difference was observed for psychological variables feeling scale (FS) (p= .011), Borg scale (p= .016) and internal training load (ITL) (p<.001). This study demonstrates the relation of the self-selected session with more affective psychological responses and low perceived effort as well as greater physiological responses (HR and lnSD1) from 10 minutes in the prescribed session when compared to the self-selected.

Keywords : affect, internal training load; subjective scale; exercise intensity; heart rate variability.

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