What does this research mean for the field?

Variable exercise capacity in healthy adolescents is primarily determined by stroke volume, central and peripheral oxygen uptake efficiency, and anaerobic tolerance, rather than chronotropic reserve or ventilatory efficiency of carbon dioxide excretion. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To characterize the underlying physiological mechanisms driving variable exercise capacity among healthy adolescents.

September 29, 2026Pediatric Cardiology

Variable Degrees of Exercise Capacity Characterized by Comprehensive Cardiopulmonary Exercise Testing among Contemporary Adolescents

Q: What is the clinical evidence from this study?

Study design: Observational. Population: Disease-free (normal) adolescents (n=233). Intervention: Exercise capacity level (%predicted maximum VO2/kg) vs. Poor ( 100%) performers. Primary outcome: Correlation of peak and submaximal CPET parameters with peak VO2/kg.

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Key result

Adolescent exercise capacity strongly correlates with peak oxygen pulse, reflecting stroke volume and oxygen uptake efficiency.

n=233

Population

233 disease-free (normal) adolescents (115 males, 118 females)

Comparison

Cardiopulmonary exercise testing (CPET) vs Stratification by %predicted maximum oxygen…

Design

Cohort

Authors

TTTakeshi TsudaDuPont (United States)ASAbby SkienaThomas Jefferson University

Discussion

Member takes

Implication

Supports stroke volume focus in adolescent CPET; leaves open prospective validation before practice change.

Key Points

To characterize the underlying physiological mechanisms driving variable exercise capacity among healthy adolescents.
Retrospective analysis of cardiopulmonary exercise testing (CPET) data from 233 disease-free adolescents (115 males, 118 females).
Participants were stratified into three performance tiers based on percent predicted maximum oxygen consumption (%VO2/kg): poor (<80%), average (80–100%), and superior (>100%).
Evaluated peak and submaximal CPET parameters, assessing cardiovascular dynamics, ventilatory thresholds, and oxygen uptake efficiency across cohorts.
Peak VO2/kg correlated positively with peak oxygen pulse/kg (r = 0.93 in males, r = 0.95 in females) and [VO2/kg]/HR slope (r = 0.58 in males, r = 0.53 in females), but negatively with HR/[work rate/kg] slope (r = -0.33 in males, r = -0.27 in females).
Stepwise differences among the three performance groups were observed in relationships for peak work rate, ventilatory anaerobic threshold, and peak minute ventilation against peak VO2, while age, peak heart rate, heart rate reserve, and submaximal ΔVE/ΔVCO2 slopes were comparable.

Study Design

Type

Observational (n=233)

Structured PICO

Population

233 disease-free normal adolescents (115 males, 118 females) evaluated retrospectively to characterize physiological mechanisms of variable exercise capacity.

Exposure

Cardiopulmonary exercise testing (CPET)

Comparator

Stratification by %predicted maximum oxygen consumption (VO2)/kg: < 80% (poor), 80–100% (average), and > 100% (superior)

Outcome

Correlation of peak and submaximal CPET parameters with the level of exercise performance (pVO2/kg)surrogate

Variable exercise capacity in normal adolescents is driven by stroke volume and oxygen uptake efficiency, not chronotropic reserve.

Cite This Study

Tsuda et al. (2026) conducted an observational in Disease-free (normal) adolescents (n=233). Exercise capacity level (%predicted maximum VO2/kg) vs. Poor (<80%), average (80-100%), and superior (>100%) performers was evaluated on Correlation of peak and submaximal CPET parameters with peak VO2/kg. Variable exercise capacity in normal adolescents correlated strongly with peak oxygen pulse (r=0.93 in males, r=0.95 in females), suggesting dependence on stroke volume and oxygen uptake efficiency.

synapsesocial.com/papers/6abb05e2077501092874c05e https://doi.org/10.1007/s00246-026-04476-w

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Variable Degrees of Exercise Capacity Characterized by Comprehensive Cardiopulmonary Exercise Testing among Contemporary Adolescents

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Cite This Study

Variable Degrees of Exercise Capacity Characterized by Comprehensive Cardiopulmonary Exercise Testing among Contemporary Adolescents

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Cite This Study

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Also Consider