Male athletes who eat fewer than 32 calories per pound of body weight per day are very likely to have overtraining syndrome, based on this study.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Whether chronically low energy and macronutrient intake prospectively increases the risk of developing OTS.
A 6-month prospective cohort study of 300 male athletes monitoring daily dietary intake via food logs, training load, and biomarkers, with blinded assessment of OTS development, analyzing time to event based on intake thresholds.
Whether increasing caloric intake above 32 kcal/kg/day prevents or reverses OTS in at-risk athletes.
A double-blind RCT of 100 male athletes with early OTS signs, randomized to energy supplementation (to achieve >40 kcal/kg/day) vs placebo for 8 weeks, measuring recovery of performance, mood, and biomarkers.
Whether the association between low caloric intake and OTS is replicable in other athlete populations.
A cross-sectional study of 150 male athletes from different sports and countries, assessing dietary intake and OTS status using identical EROS criteria to validate the 32 kcal/kg/day threshold.