in. “It will be important to understand if this same mechanism that appears to be operant in moderately trained mice is also responsible for severe bradycardia and atrial rhythm disease sometimes observed in endurance sportsmen,
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,” he says.
D’Souza agrees that their next step is to look at sinus bradycardia after longer training and in older animals. “It’s speculation at this point,” she explains. “Our data is in response to very short-term training, so we have to be cautious in interpreting our results.”
Boyett points out that the bradycardia was reversible in their young,
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, fit animals, as it is in young athletes when they take time off from training. “But in older athletes it may not be reversible.” So for now, he says, the main message is “everything in moderation.”
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