Abstract
The research focused on the relationships between frequency of physical activity (FPA), general self‐efficacy perception and motor self‐efficacy perception (GSP and MSP), and cardiorespiratory adapting capacity (CAC). Participants in the study were 2,809 Spaniards between the ages of 9 and 17 (12.6 ± 2.8). Scales to assess GSP, MSP, FPA, and Ruffier's test to measure CAC was used. Results show high percentages of inactive population, especially in older girls; they also indicate a significant correlation (p < .01) between all the variables studied. Regression analysis shows that MSP and CAC explain the 19.1% variability in FPA (R2 = .191), with significant differences according to age and gender. CAC increasingly explains FPA from the age of 12 onwards and, especially, in boys older than 14.
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