Reliability of an incremental multi-modal circuit in the determination of the anaerobic threshold of elderly people through the dosage of the blood lactate
DOI:
https://doi.org/10.11606/issn.1981-4690.v35i4p145-153Keywords:
Circuit-Based Exercise; Anaerobic threshold; Elderly; Circuit ExercisesAbstract
The study aimed to measure the reliability of an incremental multimodal circuit in determining the anaerobic threshold (AT) in the elderly through the measurement of blood lactate (BL). The sample consisted of 20 elderly people aged 66.8 years, non-sedentary, female (75%). The circuit was composed by four exercises, in a three-phase protocol, with 72-hour intervals between phases. The first phase consisted of learning the exercises and marking the metronome and lasted for two weeks. Phases 2 and 3 consisted of test and retest with four exercises: half squat with flexion and elbow extension; walking; sit and get up from the chair; up and down the step. At the end of each phase, BL collections were performed and the values for the Subjective Effort Perception were obtained. The anaerobic threshold 2 (AT 2) was determined using the Bi-segmented model and the Maximum Distance mathematical model. For the analysis of intraobserver reliability and concordance, the Intraclass Correlation Coefficient (ICC) and the Bland-Altman concordance test were used. One-way ANOVA and Wilcoxon or Friedman tests were used to analyze the equality of means in the test and in the retest. The results indicated reliability and agreement between the test-retest measures for the studied variables, suggesting the adequacy of the incremental multimodal circuit in determining the anaerobic threshold in the elderly through the measurement of blood lactate.
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