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February 21, 2012Scandinavian Journal of Medicine and Science in Sports

Faster pulmonary oxygen uptake kinetics in children vs adults due to enhancements in oxygen delivery and extraction

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Why the study?

Does prepubertal age improve pulmonary oxygen uptake kinetics during moderate-intensity exercise in males?

Population

11 prepubertal boys and 12 men (n=23)

Comparison

Moderate-intensity constant load cycling exercise vs Young adults (men)

Design

Cross-sectional

Authors

ELErwan LeclairUniversité de SherbrookeSBSerge BerthoinUniversité de LilleBBBenoît BorelUniversité de Limoges

Discussion

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Implication

Faster VO2 kinetics in prepubertal boys may reflect developmental differences in O2 delivery and extraction; leaves open causal mechanisms and clinical relevance.

Structured PICO

Does prepubertal age improve pulmonary oxygen uptake kinetics during moderate-intensity exercise in males?

P
Population
11 prepubertal boys and 12 men (n=23)
I
Intervention
Moderate-intensity constant load cycling exercise (four constant load exercises at 90% of gas exchange threshold)
C
Comparator
Young adults (men)
O
Outcome
Pulmonary oxygen uptake (VO2p) kinetics, deoxyhemoglobin (HHb) kinetics, and estimated capillary blood flow (Qcap) kineticssurrogate

Faster pulmonary oxygen uptake kinetics in children during exercise appear to be driven by both faster oxygen extraction and delivery kinetics.

Cite This Study

Leclair et al. (2012) studied this question.

synapsesocial.com/papers/6a7588b53c1d3f13c2dd7ec6https://doi.org/10.1111/j.1600-0838.2012.01446.x
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Oxygen uptake and heart rate responses during hypoxic exercise in children and adults1991 · 96 citations
  2. 2Muscle capillary blood flow kinetics estimated from pulmonary O2 uptake and near-infrared spectroscopy2005 · 168 citations
  3. 3Oxygen uptake kinetics in children and adults after the onset of moderate-intensity exercise2002 · 113 citations
  4. 4Muscular and pulmonary O2 uptake kinetics during moderate‐ and high‐intensity sub‐maximal knee‐extensor exercise in humans2009 · 167 citations
  5. 5Inferences from pulmonary O2 uptake with respect to intramuscular [phosphocreatine] kinetics during moderate exercise in humans1999 · 292 citations