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The study cross-validated existing RMR prediction equations using indirect calorimetry in 173 male collegiate wrestlers.
Body mass-based equations generally underestimated measured RMR; equations incorporating fat-free mass (FFM) showed better accuracy.
Newly developed prediction equations demonstrated mean bias less than 2% relative to measured RMR, suggesting higher precision.
Findings support tailored RMR estimation for male wrestlers to optimize nutritional and performance interventions.


