**Spectral Analysis of Heart Rate Variability in Women**

Ester da Silva1,2, Ana Cristina S. Rebelo1, Nayara Y. Tamburús2, Mariana R. Salviati2, Marcio Clementino S. Santos3 and Roberta S. Zuttin2 *1Federal University of São Carlos, São Carlos, SP, 2College of Health Sciences, Methodist University of Piracicaba, Piracicaba, SP, 3Pará State University, Belém, PA, Brazil* 
