Why the study?
Does significantly increasing training mileage increase morning heart rate as a sign of overtraining in male runners?
Population
12 men who ran twice their regular training mileage during a 500-km (312-mile) road race over 20 days
Comparison
Running a 500-km road race over 20 days vs Baseline/early race (first week of running)
Design
Cohort
Follow-up
20 days
Authors
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May indicate overtraining with rising mileage in runners; supports consensus but leaves open need for prospective trials.
Does significantly increasing training mileage increase morning heart rate as a sign of overtraining in male runners?
An elevated resting morning heart rate is a valid sign of overtraining in endurance athletes who significantly increase their training volume.
Dressendorfer et al. (1985) studied this question.
Synapse has enriched 2 closely related papers on similar clinical questions. Consider them for comparative context: