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Purpose: To examine the relationships and precision of predictive REE (pREE) against measured (mREE) values in competitive strength-power athletes.Methods: Twelve male powerlifters and weightlifters (22.4AE2.6y, 175.2AE7.8cm, 92.0AE22.1kg) participated in the study. Upon waking and in a fasted state, each participant followed standard hydration and body composition protocols followed by an REE assessment using a metabolic cart. Each participant laid motionless in a reclined position with a respiratory exchange mask for 40 minutes. The final 30 minutes was averaged to determine mREE. Pearson correlations were used to assess the relationships between mREE and pREE. Percent differences were calculated to determine over-underestimates between mREE and pREE values.Results: Large relationships were observed between mREE and pREE for both predictive equations (MSJ [r¼0.660]; WHO [r¼0.685]). Relative to mREE values, the over-under percent difference was greatest for MSJ (11.0AE12.3%) compared to the WHO (2.2AE12.0%). Conclusion:When dealing with athletic populations the WHO equation should be considered for dietary prescriptions considering that the pREE appears to be more indicative of actual energy needs.