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Título
Correlates of Heart Rate Measures with Incidental Physical Activity and Cardiorespiratory Fitness in Overweight Female Workers
Autor
Facultad/Centro
Área de conocimiento
Título de la revista
Frontiers in Physiology
Datos de la obra
Tonello, L.; Reichert, F. F.; Oliveira Silva, I.; Leicht, A. S.; Boullosa Álvarez, D. A. (2016). Correlates of Heart Rate Measures with Incidental Physical Activity and Cardiorespiratory Fitness in Overweight Female Workers. Frontiers in Physiology, 6
Editor
Frontiers Media
Fecha
2016
Résumé
[EN] Previous studies have suggested that physical activity (PA) levels and cardiorespiratory
fitness (CRF) impact on the autonomic control of heart rate (HR). However, previous
studies evaluating PA levels did not discriminate between incidental PA and regular
exercise. We hypothesized that incidental PA “per se” would influence cardiac autonomic
indices as assessed via HR variability (HRV) and HR recovery (HRR) in non-exercisers.
Thus, the objective of this study was to investigate the relationships between objective
PA levels, CRF, and cardiac autonomic indices in adult, regular non-exercising female
workers. After familiarization with procedures and evaluation of body composition,
21 women completed a submaximal cycling test and evaluation of HRR on four
different days. Resting (2-min seated and standing) and ambulatory (4-h) HRV were also
recorded. Levels of PA were assessed by accelerometry over five consecutive days (i.e.,
Wednesday to Sunday). Maximum oxygen consumption (VO2max) was measured as an
index of CRF. As reliability was low to moderate for most HR measures, relationships
between these and PA and CRF were examined using the 4-day average measures.
Significant correlations were identified between post-exercise HRR in the first min with
various PA indices (daily moderate PA, daily vigorous PA, and the sum of vigorous and
very vigorous daily PA). Additionally, VO2max was significantly correlated to HRV but not
to HRR. The current results indicated that CRF was influential in enhancing HRV while
incidental or non-exercise based PA was associated with greater autonomic reactivation
in adult overweight women. Therefore, both CRF and non-exercise based PA contribute
significant but diverse effects on cardiac health. The use of 4-day averages instead of
single measures for evaluation of autonomic control of HR may provide a better indication
of regular cardiac autonomic function that remains to be refined.
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