title: [Acute responses on lipid profile by practicing cycling].
abstract: BACKGROUND
  it has been demonstrated an association between the increase in physical activity and improvements in the lipid profile.
  
  
  OBJECTIVE
  to evaluate changes in the serum lipids caused by spinning practice.
  
  
  METHODS
  nine men and twelve women were studied, they underwent to an initial evaluation that included a treadmill effort test, in order to establish the physical fitness level. With the purpose of determine the lipids change, a blood sample was obtained before and after a typical spinning session. The design was prospective, experimental, longitudinal and comparative study. Student's t-test and regression model were used to determine the changes in the lipids concentrations, and its relation with the physical fitness level. A p value < or = 0.05 was required for statistical significance.
  
  
  RESULTS
  lipids increase concentrations were observed (p < 0.05), except at triglycerides in men, in which it had a decrease. It was statistically significant relation between the physical fitness level and the percentage of high-density lipoproteins variation (r = 0.44, p = 0.046).
  
  
  CONCLUSIONS
  the percentage of high-density lipoproteins variation was greater when the values of VO(2)max were higher. At greater level of medical fitness greater positive answer in this lipoproteins. In the case of the rest serum lipids, it was not observed relation between the level of medical fitness and the percentage of variation due to the execution of the spinning session.
authors.affiliation: Departamento de Fisiología, Club Deportivo Punto Verde, Mexico. harinitta@yahoo.com.mx
authors.forename: Lillian Karina
authors.initials: LK
authors.lastname: Díaz-Ríos
authors.forename: Antonio Eugenio
authors.initials: AE
authors.lastname: Rivera-Cisneros
authors.forename: Maciste Habacuc
authors.initials: MH
authors.lastname: Macías-Cervantes
authors.forename: Jorge Manuel
authors.initials: JM
authors.lastname: Sánchez-González
authors.forename: Francisco Javier
authors.initials: FJ
authors.lastname: Guerrero-Martínez
mesh_terms: D000328:Adult; D002784:Cholesterol / Q000097:blood*; D015444:Exercise; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D010809:Physical Fitness; D011446:Prospective Studies; D014280:Triglycerides / Q000378:metabolism
chemical_list: D014280:Triglycerides; D002784:Cholesterol