The purpose of this study was to examine the sprint time and cardiovascular fitness among professional soccer players during in-season’s training sessions. Thirty participants who officially registered as Perbadanan Kemajuan Negeri Perak Football (PKNP) Club professional soccer players participated in this study. Data were collected during actual in-season training sessions from December 2016 to April 2017. Sprint time performance was determined by the 20m sprint test and 20m Yoyo Intermittent Recovery Test Level 1 was used to determine the cardiovascular fitness level of the players. Repeated Measures and Pearson Correlation Coefficient was used to analyzed the data, there was significant improvement (p<0.05) for sprinting performance from pre-test (3.59 ± 0.36 sec) to post-test (3.20 ± 0.14 sec). There was also a significant improvement for cardiovascular performance from pre-test (68.65 ± 3.88 mhkg-1·min-1) to post-test (75.40 ± 5.45 mhkg-1·min-1) throughout the four months of training periods. There was a significant relationship (p<0.05) between sprint time performance and cardiovascular fitness performance for all six series testing. Thus, it can be concluded that throughout the process of monitoring, the player’s performance can be identified, as showed in this study there was an improvement on sprinting performance and cardiovascular fitness performance throughout six series testing, which mean players undergone relevant training program during the in-season training session.

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