10.6084/m9.figshare.10258121.v1 Julio Cezar Schamne Julio Cezar Schamne Adalberto Ferreira Junior Adalberto Ferreira Junior Amanda Cristiane de Araújo Amanda Cristiane de Araújo Adriano Eduardo Lima-Silva Adriano Eduardo Lima-Silva Rômulo Cássio de Moraes Bertuzzi Rômulo Cássio de Moraes Bertuzzi Nilo Massaru Okuno Nilo Massaru Okuno Cardiac autonomic responses during and after a single session of aerobic exercise with and without blood flow restriction SciELO journals 2019 vascular occlusion acute responses heart rate heart rate variability 2019-11-06 02:43:27 Dataset https://scielo.figshare.com/articles/dataset/Cardiac_autonomic_responses_during_and_after_a_single_session_of_aerobic_exercise_with_and_without_blood_flow_restriction/10258121 <div><p>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.</p></div>