Population
10 male elite cyclists competing in the first Race across the Alps in 2001
Design
Cohort
Follow-up
mean 27 hours and 25 minutes (race duration)
Authors
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Declining HR intensity may inform pacing in ultracycling; leaves open generalizability of 70% HRmax threshold beyond this cohort.
In elite ultramarathon cyclists, heart rate response decreases substantially over time, suggesting an ultraendurance threshold of approximately 70% of maximal heart rate.
Neumayr et al. (2004) studied this question.
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