These female pro soccer players eat about 2,300 calories a day, but they burn nearly 3,000 — meaning they’re likely not eating enough to keep up with their training.
Scientific Claim
Professional female football players consume an average of 2344 kcal/day (95% CI: 2023–2589), which is below their estimated total daily energy expenditure of 2882 kcal/day, suggesting a chronic energy deficit in this population.
Original Statement
“Weighted energy intake was 2344 kcal [2023–2589]. TDEE was 2882 ± 278 kcal/day...”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design cannot support claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The abstract presents measured values for intake and expenditure without claiming causation or intent. The implication of deficit is logically derived from the numbers, and the language remains descriptive and non-causal.
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.
Randomized Controlled TrialLevel 1bWhether increasing energy intake to match TDEE improves performance, recovery, or hormonal markers in female footballers.
Whether increasing energy intake to match TDEE improves performance, recovery, or hormonal markers in female footballers.
What This Would Prove
Whether increasing energy intake to match TDEE improves performance, recovery, or hormonal markers in female footballers.
Ideal Study Design
A double-blind RCT of 60 professional female football players randomized to either increased energy intake (target: TDEE + 10%) via structured meal plans or habitual intake for 12 weeks, measuring changes in body composition (DXA), training load tolerance, cortisol levels, and menstrual regularity as primary outcomes.
Limitation: Cannot determine if the deficit itself causes long-term health consequences without longer follow-up.
Prospective Cohort StudyLevel 2bWhether chronic energy deficit in female footballers predicts long-term health outcomes like bone density loss or amenorrhea.
Whether chronic energy deficit in female footballers predicts long-term health outcomes like bone density loss or amenorrhea.
What This Would Prove
Whether chronic energy deficit in female footballers predicts long-term health outcomes like bone density loss or amenorrhea.
Ideal Study Design
A 3-year prospective cohort of 150+ professional female football players tracking daily energy intake (food logs), TDEE (doubly labeled water quarterly), and clinical outcomes (BMD via DXA, menstrual cycle regularity, injury rates), adjusting for training load and age.
Limitation: Cannot prove causation due to confounding lifestyle factors.
Cross-Sectional StudyLevel 3In EvidenceThe prevalence of energy deficit in professional female football players across different leagues and countries.
The prevalence of energy deficit in professional female football players across different leagues and countries.
What This Would Prove
The prevalence of energy deficit in professional female football players across different leagues and countries.
Ideal Study Design
A multicenter cross-sectional study of 300+ professional female football players across 10+ European leagues, measuring TDEE (doubly labeled water) and energy intake (7-day food diary), defining deficit as intake <90% of TDEE, and reporting prevalence and correlates.
Limitation: Cannot determine if deficit is acute or chronic, or its consequences.
Evidence from Studies
Supporting (1)
The study found that these female soccer players eat about 2344 calories a day but burn about 2882 calories a day — so they’re not eating enough to keep up with how much energy they use, which means they’re in a calorie deficit.