The purpose of this study is to determine whether there is a correlation between internal load and external load and to examine their effects on match opponents and match results in formal women's football matches. Methods: The internal and external loads of twenty-two professional female football players during all official matches in the 2021 season were recorded. During the matches, the players wore GPS with accelerometers to track their external load. TRIMP was calculated by their heart rate, sRPE was calculated to examine their internal load. Total distance, distance covered at high speed zone, acceleration distance, times of acceleration and deceleration, and times of turn left and turn right and PlayerLoadTM were collected as external load during the match by GPS systems. The correlation analysis on internal and external loads were conducted; the internal and external loads of different match opponent and results were analyzed using one-way ANOVA. Result: There were moderate correlations between total distance and RPE (r=0.412, P<0.01). Total distance showed a strong correlation with both sRPE and TRIMP (r=0.805, P<0.01) (r=0.804, P<0.01). There were moderate correlations between times of acceleration and decerleration and sRPE(r=0.465, P<0.01), TRIMP (r=0.463, P<0.01).There were moderate relationship between TRIMP and times of turn left and right (r=0.435, P<0.01). There were moderate correlations between sRPE and PlayerLoadTM (r=0.697, P<0.01), but strong relationship between TRIMP and PlayerLoadTM (r=0.754, P<0.01). RPE and sRPE for matches against second-tier group was lower than with first-tier group(P<0.05). Times of acceleration and deceleration was higher when lose(P<0.05). Conclusion: sRPE were strongly correlated with total distance and TRIMP. RPE was affected by different opponent level. Times of acceleration and deceleration was higher when lose the game. This study suggests internal and external load work together to evaluate players' work load. |