Article: Exercise heart rate recovery does not indicate quality of vagal function.

2004 AUG 30 - (NewsRx.com & NewsRx.net) -- Exercise heart rate recovery does not indicate quality of vagal function.

"Although delayed recovery of heart rate (HR) after exercise indicates poor prognosis, the relative role of parasympathetic reactivation versus sympathetic withdrawal in controlling exercise HR recovery remains controversial," investigators in the United States report.

"Quantifying HR recovery is difficult because the rate of recovery varies with exercise level. This study develops a model of HR recovery applicable to multiple exercise levels simultaneously. Using the Levenberg-Marquardt method for nonlinear models, HR curves for 11 ...

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