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Relationship between heart rate variability and performance in eccentric training with blood flow restriction
Igor F Santos1, Leonardo K Lemos2, Taíse M Biral3
1Graduate in Physiotherapy, Universidade Estadual Paulista (FCT/UNESP), Presidente Prudente, São Paulo, Brazil.
Blood flow restriction (BFR) with eccentric exercise correlates with performance and autonomic nervous system adaptation. High loads with BFR improved performance, while low loads increased parasympathetic indices without performance changes.
Area of Science:
- Exercise Physiology
- Autonomic Nervous System Adaptation
- Sports Performance
Background:
- Blood flow restriction (BFR) training enhances strength and hypertrophy.
- Limited data exist on long-term autonomic nervous system (ANS) adaptation to BFR eccentric training and its performance impact.
Purpose of the Study:
- To monitor ANS adaptations during eccentric training with BFR at varying loads.
- To correlate these ANS changes with performance modifications.
Main Methods:
- A 4-arm, randomized controlled trial involving 60 men.
- Four groups: low load (LL), high load (HL), LL with BFR (LL-BFR), and HL with BFR (HL-BFR).
- Eccentric training of the quadriceps femoris, with performance and heart rate variability (HRV) assessments.
Main Results:
- Significant correlation between performance and HRV in LL-BFR and HL-BFR groups.
- LL-BFR group showed increased parasympathetic indices.
- HL-BFR group demonstrated increased performance.
Conclusions:
- HRV indices correlate with performance outcomes in BFR eccentric training.
- LL-BFR enhanced parasympathetic activity without performance improvement.
- HL-BFR improved performance with no significant ANS changes.
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