The Claim
Fourteen days of low energy availability at 22 kcal/kg fat-free mass per day in female endurance athletes reduces exercise-induced mobilization of leukocytes by 14.2% and neutrophils by 24.8% compared to baseline, despite no change in resting counts, indicating a reduction in immune cell trafficking in response to physical stress.
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.
When female endurance athletes consume too few calories for 14 days, their bodies release fewer white blood cells during exercise compared to normal conditions, even though baseline levels remain unchanged.
See the scientific wording
Fourteen days of low energy availability (22 kcal/kg fat-free mass/day) in female endurance athletes reduces the exercise-induced mobilization of leukocytes by 14.2% and neutrophils by 24.8%, despite unchanged resting counts, indicating impaired immune cell trafficking in response to physical stress.
When the body doesn't get enough energy for training, stress hormones rise, which causes immune cells to produce more damaging molecules called reactive oxygen species. This overactivation makes the immune system less responsive to exercise, so fewer immune cells move from the body's tissues into the bloodstream during physical activity, even though their normal levels stay the same.
What the research says
1 studyWhen female athletes don’t eat enough calories for their training for two weeks, their bodies don’t send as many immune cells into the blood during exercise—even though their normal immune cell levels stay the same. This study proved that happens.
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.