Key result
RER thresholds ≥1.10 yield comparable VO2max to <1.10 in pediatric endurance athletes.
Why the study?
RER thresholds of >=1.00 or >=1.10 are used interchangeably to indicate maximal effort during pediatric CPET, but no unified criteria exist for pediatric endurance athletes.
Does an RER cutoff of ≥1.10 compared to <1.10 result in a significant difference in measured VO2max in pediatric endurance athletes?
Population
1241 healthy recreational pediatric endurance athletes fulfilling maximal effort CPET criteria
Comparison
RER >=1.10 (group A) vs RER <1.10 (group B)
Design
Retrospective cross-sectional study
Authors
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Comparable VO2max across RER thresholds supports inclusive maximal-effort criteria in youth athletes; leaves open prospective validation of standards.
Does an RER cutoff of ≥1.10 compared to <1.10 result in a significant difference in measured VO2max in pediatric endurance athletes?
In pediatric endurance athletes, an RER threshold of ≥1.00 is sufficient to confirm maximal effort during CPET, as a higher threshold of ≥1.10 does not yield significantly higher VO2max values.
Kasiak et al. (2026) studied this question. Respiratory exchange ratio thresholds of ≥1.10 versus <1.10 yielded comparable VO2max in pediatric endurance athletes, with no significant difference in boys (P=0.099) or girls (P=0.124).
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