Cardiac autonomic responses during and after a single session of aerobic exercise with and without blood flow restriction
Motriz (Online)
;
25(3): e101936, 2019. tab, graf
Article
in English
| LILACS
| ID: biblio-1040650
ABSTRACT
Aim:
To verify the on and off heart rate (HR) and HR variability (HRV) kinetics during a high-load aerobic exercise and a low-load aerobic exercise, with and without blood flow restriction (BFR).Methods:
Fourteen healthy male subjects performed three randomly assigned experimental sessions 1) 10 minutes walking at 40% of maximal aerobic speed (MAS) (40LL); 2) 10 minutes walking at 40% of MAS with BFR (40LL+BFR); and 3) 10 minutes running at 70% of MAS (70HL). The HR and HRV measurements were taken at rest, during exercise and the recovery period after constant load sessions.Results:
The HR on- and off- kinetics, and HRV on-kinetics were faster in 40LL than in 40LL +BFR and 70HL (p < 0.05). The time constant (τon) of HR on-kinetics was faster in 40LL+BFR than in 70HL (23.4 ± 9.5 s vs 42 ± 9.5 s, respectively, p < 0.01), and was accompanied by faster HRV on-kinetics (12.4 ± 9.6 s vs 20.3 ± 13.7 s, respectively, p < 0.01). Although HR off-kinetics was not different between 40LL+BFR and 70HL, the recovery of time and frequency HRV indices were delayed in 70HL when compared to 40LL and 40LL+BFR (p < 0.05).Conclusions:
These findings indicate that 40LL promoted faster cardiac adjustments compared to 40LL+BFR and 70HL sessions. Additionally, 40LL+BFR promoted faster cardiac adjustment and better HRV recovery compared to the 70HL session. (AU)
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Blood Circulation
/
Exercise
/
Blood Flow Restriction Therapy
/
Heart Rate
Limits:
Humans
/
Male
Language:
English
Journal:
Motriz (Online)
Journal subject:
EducaÆo F¡sica e Treinamento
/
Medicina Esportiva
/
Medicina F¡sica e ReabilitaÆo
Year:
2019
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade Estadual de Ponta Grossa/BR
/
Universidade Tecnológica Federal do Paraná/BR
/
Universidade de São Paulo/BR
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