September 18, 2010AJP Heart and Circulatory Physiology

Individual differences in the heart rate response to activation of the muscle metaboreflex in humans

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Why the study?

Does postexercise muscle ischemia (PEMI) elicit individual differences in heart rate response associated with cardiac autonomic tone in healthy subjects?

Population

51 healthy subjects (36 men and 15 women)

Comparison

1-min isometric handgrip exercise at 50% maximal… vs Resting state and recovery period

Design

Other

Authors

KWKazuhito WatanabeUniversity of London MIMasashi IchinoseMeiji University NFNaoto FujiiKobe Design University

Discussion

Member takes

Implication

Individual PEMI HR responses may reflect parasympathetic tone in healthy subjects; hypothesis-generating for baroreflex mechanisms in autonomic research.

Structured PICO

Does postexercise muscle ischemia (PEMI) elicit individual differences in heart rate response associated with cardiac autonomic tone in healthy subjects?

Population

51 healthy subjects (36 men and 15 women)

Intervention

1-min isometric handgrip exercise at 50% maximal voluntary contraction, followed by a 3.5-min period of imposed postexercise muscle ischemia (PEMI)

Comparator

Resting state and recovery period

Outcome

Heart rate response (measured by R-R interval) and its correlation with cardiac autonomic tone and arterial baroreflex functionsurrogate

The heart rate response to postexercise muscle ischemia varies considerably among individuals, reflecting changes in cardiac parasympathetic tone and spontaneous baroreflex sensitivity.

Cite This Study

Watanabe et al. (2010) studied this question.

synapsesocial.com/papers/6a107eb5d13714ec96fff01d https://doi.org/10.1152/ajpheart.00255.2010

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Implication

Individual PEMI HR responses may reflect parasympathetic tone in healthy subjects; hypothesis-generating for baroreflex mechanisms in autonomic research.