The Claim
Twelve-year-old endurance athletes have an 18% higher maximal oxygen uptake (VO2max) relative to fat-free mass than non-endurance-trained peers.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Twelve-year-old endurance athletes have 18% higher maximal oxygen uptake per kilogram of fat-free mass than peers who do not train in endurance sports.
See the scientific wording
Twelve-year-old endurance athletes have approximately 18% higher maximal oxygen uptake (VO2max) relative to fat-free mass compared to non-endurance-trained peers, indicating greater aerobic capacity in this population.
Endurance training causes the heart's left chamber to hold more blood between beats, which makes each heartbeat pump out more blood. This delivers more oxygen to the muscles with every pulse, allowing the body to use more oxygen during intense exercise.
What the research says
1 studyThe study found that 12-year-old cross-country skiers use about 18% more oxygen per pound of muscle than kids who don’t train endurance sports, which means their bodies are better at using oxygen during exercise—just like the claim says.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.