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Correspondence to: Lídia Miranda Barreto – Avenida Alfredo Balena, 190, 2o andar, sala 202 – CEP: 30130-100 – Belo Horizonte (MG), Brasil – E-mail: lidia.mbarreto@gmail.com Presentation: Nov. 2012 – Accepted for publication: Aug. 2013 – Financing source: none – Conflict of interests: nothing to declare – Approval at the Ethics Committee n. 0063.0.203.000-10. AbstrAct | Respiratory Muscle Strength is an important tool to diagnose different disorders. Reference equations considered different populations and methodologies. However, there is no agreement on what is the ideal equation to use. The aim of this study was to compare and correlate the measured values of maximal respiratory pressures with those demonstrated by equations described in literature. The sample consisted of 90 healthy individuals aged from 6 to 12 years old. Anthropometric, spirometric and manometric measurements were performed. The comparison between measured and predicted values was significantly different, showing the mean male maximum inspiratory pressure (MIP) (80.65±26.78) to be higher than that predicted by Wilson et al. (67.40±5.65, p<0.001) and Schmidt et al. (70.69±21.70, p<0.05). The mean male maximum expiratory pressure (MEP) (84.35±23.16) was lower than the one predicted by Domènech-Clar et al. (92.25±16.90, p<0.01) and higher than the one predicted by Schmidt et al. (72.78±13.62 p<0.001). The mean of female individuals’ MIP (76.14±26.08) was higher than that predicted by Wilson et al. (57.96±6.04, p<0.001), Schmidt et al. (68.54±7.08, p<0.01), and Domènech-Clar et al. (67.61±11.17, p<0.01). The mean female MEP (74.55±20.05) was higher than the ones predicted by Wilson et al. (66.65±9.55, p<0.001) and lower than the one predicted by Comparison of measured and predicted values for maximum respiratory pressures in healthy students Comparação dos valores medidos e previstos de pressões respiratórias máximas em escolares saudáveis Comparación de los valores medidos y previstos de presiones respiratorias máximas en escolares sanos. Lídia Miranda Barreto, Marco Antônio Duarte, Sarah Costa Drumond de Oliveira Moura, Betânia Luiza Alexandre, Leonardo Silva Augusto, Maria Jussara Fernandes Fontes