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. 2019 May 16:23:100378.
doi: 10.1016/j.ijcha.2019.100378. eCollection 2019 Jun.

Fed and fasted states on heart rate variability, hemodynamic heart rate and blood pressure in adults submitted to moderate aerobic exercise

J A L Rodrigues  1 , A C Yamane  2 , T C P Gonçalves  3 , C Kalva-Filho  2 , M Papoti  2 , C R B Júnior  1   3   2
Affiliations

Fed and fasted states on heart rate variability, hemodynamic heart rate and blood pressure in adults submitted to moderate aerobic exercise

J A L Rodrigues et al. Int J Cardiol Heart Vasc. .

Abstract

Background: Heart rate variability (HRV) has proven to be a powerful non-invasive tool to investigate cardiac autonomic control and, seems to be influenced by nutritional status and exercise practice. However, the acute effects of fed or fasting states on HRV and blood pressure (BP) during low-to-moderate intensity aerobic exercise are currently unknown. Therefore, we investigated the baseline values and behavior of HRV, BP, and heart rate (HR) before and after low-to-moderate intensity aerobic exercise in fed and fasted states in healthy adults.

Methods: 12 healthy individuals with mean age (SD) 59.0 (9.1) years performed two tests on a treadmill at 80% of the mean velocity of the 6-min walking test separated by 48 h: 12 h fasted (FST) or 1 h fed (FED). HRV, BP and HR were analyzed at rest, posttest, and at the third, fifth, and seventh minutes of recovery.

Results: HRV and HR presented no significant alterations between nutritional conditions. HR at baseline was not different between nutritional conditions. Diastolic blood pressure was increased during the fasted baseline state.

Conclusions: The results of the current study provide that 12 h overnight fasting does not seem to be enough to affect significant changes in the autonomic modulation in healthy adults submitted to low-to-moderate intensity aerobic exercise.

Keywords: Aging process; Autonomic modulation; Exercise; Fasting; Nutrition.

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Conflict of interest statement

None declared.

Figures

Fig. 1
Fig. 1
Experimental design. 6MWT: six minutes' walk test; FST: after 12 h of overnight fasting condition; FED: after 1 h after a regular breakfast; HRV: heart rate variability; BP: blood pressure; HR: heart rate.
Fig. 2
Fig. 2
Heart rate response at baseline, after exercise and during recovery. Closed symbols represent the fed condition, while open symbols represent the fasted condition. *Significant difference from baseline (p < 0.05).
Fig. 3
Fig. 3
Systolic blood pressure at baseline, after exercise and during recovery. Closed symbols represent the fed condition, while open symbols represent the fasted condition.
Fig. 4
Fig. 4
Diastolic blood pressure at baseline, after exercise and during recovery. Closed symbols represent the fed condition, while open symbols represent the fasted condition. *Significant difference from baseline. #Significant difference from fed condition (p < 0.05).
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