Abstract
In a crossover design we investigated cardiac autonomic responses (heart rate variability,
HRV) to isometric handgrip exercise (IHG) in cold (4 °C) and temperate (24 °C, temp) conditions in 20 men that assumed the supine position for 30 min in an environmental chamber. After a 5 min rest, subjects performed 3 min of IHG followed by a 3 min recovery period (REC). During REC, the low frequency of HRV was lower while the
high frequency and the square root of the mean squared differences of successive NN
intervals were higher (P<0.05) than the rest in the temp compared to a full recovery in the cold. In conclusion,
recovery from concurrent cold exposure and exercise impairs cardiovagal modulation
which may precipitate cardiac events.
Keywords
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Article info
Publication history
Published online: March 04, 2013
Accepted:
February 4,
2013
Received in revised form:
January 23,
2013
Received:
May 24,
2012
Identification
Copyright
Published by Elsevier Inc.
