2013-01-222013-01-222013-01-22http://hdl.handle.net/11056/4158The objective of this study was to assess the cardiorespiratory profile (VO2max) of Costa Rican first division football players during preseason and compare VO2max by players’ positions. Methodology: A total of 9 Costa Rican first division football teams were evaluated in this study for a total sample of 219 professional players ages 20-36 with an average age of 24.64 ± 4.35 years, average body weight of 73.34 kg ± 7.34, and a fat percentage of 9.78 % ± 3.64.  In order to evaluate the VO2max of players, the treadmill protocol was used as recommended by Wilmore and Costill (2007).  This was a maximal test.  Results: an average VO2max of 57.71 ml/kg/min ± 8.8 was found; however, no statistically significant differences were found     (p = .752) between positions.  Conclusion: there were no differences in VO2max by positions.application/pdfhttp://purl.org/coar/resource_type/c_6501