Key result
Progressive mild bicycle exercise reveals a close link between baroreflex sequences and respiratory phase.
Why the study?
The interactions between baroreflex and other reflexes, mainly cardiopulmonary reflexes, are important for heart rate control but not fully characterized during exercise.
Does progressive bicycle mild dynamical exercise affect the coupling between baroreflex and respiration?
Observational
Does progressive bicycle mild dynamical exercise affect the coupling between baroreflex and respiration?
Indexes describing baroreflex based on spontaneous variability are strongly affected by cardiopulmonary influences during mild dynamical exercise.
Mild exercise may confound spontaneous baroreflex indexes via respiratory coupling; leaves open whether phase-adjusted measures improve clinical accuracy.
BACKGROUND: The baroreflex is one of the most important short-term cardiovascular autonomic control mechanisms. Its interactions with other reflexes, mainly cardiopulmonary reflexes, are of paramount importance in controlling heart rate. OBJECTIVES: This study assesses the coupling between baroreflex and respiration during a progressive bicycle mild dynamical exercise. METHODS: The coupling was assessed by symbolic analysis and conditional entropy. RESULTS: Findings suggested the close relationship between the baroreflex sequences and the phase of respiratory signal and, thus, the interference between baroreflex and cardiopulmonary reflexes. CONCLUSIONS: Indexes describing baroreflex based on spontaneous variability are strongly affected by cardiopulmonary influences.
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Vallais et al. (2010) reported an observational. Progressive bicycle mild dynamical exercise was evaluated on Coupling between baroreflex and respiration assessed by symbolic analysis and conditional entropy. Progressive bicycle mild dynamical exercise revealed a close relationship between baroreflex sequences and the phase of respiratory signals, indicating cardiopulmonary interference.
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