Beetroot (Beta Vulgaris L.) Extract Acutely Improves Heart Rate Variability Recovery Following Strength Exercise: A Randomized, Double-Blind, Placebo-Controlled Crossover Trial-Pilot Study
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Data
2020-01-01
Autores
Benjamim, Cicero Jonas R.
S. Júnior, Francisco Wellington
de Figueirêdo, Maria Íris L. S.
Benjamim, Cicera Josilânia R.
Cavalcante, Taisy C. Ferro
da Silva, Amanda A. Marcelino
Monteiro, Larissa Raylane L.
Santana, Milana Drumond R.
Garner, David M.
Valenti, Vitor E. [UNESP]
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Objective: We assessed the acute effect of beetroot extract intake on cardiovascular and autonomic recovery subsequent to strength exercise. Methods: This is a crossover, randomized, double-blind and placebo-controlled trial. We assessed 16 subjects but only 12 healthy male adults completed the two protocols in two randomized days: Beetroot extract (600 mg in capsule) and placebo (600 mg starch in capsule). Beetroot extract or placebo was ingested, the subjects endured 120 minutes seated at rest, followed by a 75% 1RM strength exercise and then remained seated for 60 minutes at rest. Cardiorespiratory parameters, heart rate (HR) variability (HRV) (SDNN, rMSSD, pNN50, SD1, SD2 HF [ms2]) were estimated before, during exercise and during recovery from exercise. Results: ingestion of beetroot extract before exercise: accelerates the recovery of SBP following physical effort; improves HR recovery to baseline resting levels (beetroot protocol: change in ∼62% vs. placebo protocol: change in ∼80%), and intensifies the return of vagal HR control during recovery after exercise. Conclusions: Beetroot extract acutely improved cardiovascular and autonomic recovery after exercise.
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autonomic nervous system, Beta vulgaris L, cardiovascular system, dietary supplements, exercise
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Journal of the American College of Nutrition.