TY - JOUR
T1 - Temporal effect of muscle contraction on respiratory sinus arrhythmia
AU - Nakamura, Y.
AU - Hayashi, N.
AU - Muraoka, I.
PY - 1997
Y1 - 1997
N2 - The purpose of this investigation was to compare the heart rate variability at respiratory frequency (HRV(RF)) in muscle contractions during the inspiratory phase with that during the expiratory phase. Eight volunteers performed pedaling on a cycle ergometer, twice a cycle of respiration (4 sec) against a load of 0.25 Nm/kg BW, of which the timing was adjusted to twice during the inspiration phase (I), once during the expiration, once during the inspiration (El), or twice during the expiration phase (E). Spectral analysis was applied to the R-R intervals of each condition. The amplitude of HRV(RF) in E was less than half of I (9 ± 2 msec versus 23 ± 2 msec). The results indicate that the timing of muscle contraction can affect the heart rate variability even at the frequency band of respiration.
AB - The purpose of this investigation was to compare the heart rate variability at respiratory frequency (HRV(RF)) in muscle contractions during the inspiratory phase with that during the expiratory phase. Eight volunteers performed pedaling on a cycle ergometer, twice a cycle of respiration (4 sec) against a load of 0.25 Nm/kg BW, of which the timing was adjusted to twice during the inspiration phase (I), once during the expiration, once during the inspiration (El), or twice during the expiration phase (E). Spectral analysis was applied to the R-R intervals of each condition. The amplitude of HRV(RF) in E was less than half of I (9 ± 2 msec versus 23 ± 2 msec). The results indicate that the timing of muscle contraction can affect the heart rate variability even at the frequency band of respiration.
KW - Heart Rate Variability
KW - Parasympathetic Nervous Activity
KW - Respiratory Phase
KW - Respiratory Sinus Arrhythmia
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U2 - 10.1055/s-0038-1636879
DO - 10.1055/s-0038-1636879
M3 - Article
C2 - 9470375
AN - SCOPUS:0031407207
VL - 36
SP - 268
EP - 270
JO - Methods of Information in Medicine
JF - Methods of Information in Medicine
SN - 0026-1270
IS - 4-5
ER -