Impact of High Intensity Contact Physical Activity During a Match on Echocardiographic Parameters and High-Sensitivity Troponin I in Competitive Rugby Players

<b>Background/Objectives</b>: High-intensity physical activity, especially in contact sports, may have harmful effect on athletes' health. The aim of the study is to determine acute changes in the function of the left ventricle in rugby players after a competitive match. <b>Methods</b>: A prospective, clinical, observational case-control study was conducted. All cases were European Caucasian male athletes, older than 18 years, who had played for at least 60 min in the investigated match. A transthoracic echocardiography and blood tests were performed in all the participants two days before the match and within one hour after the match. <b>Results</b>: The total number of examinees was 34. Out of the 31 measured echocardiographic parameters, 22 showed a statistically significant change before and after the match. We also observed changes in echocardiographic parameters in relation to the increase in high-sensitivity troponin I. Two-dimensional left ventricle (LV) end-systolic (75 ± 10.5 vs. 67.1 ± 10 mL, <i>p</i> = 0.032) and LV end-diastolic (149.7 ± 24.6 vs. 133.8 ± 13.3 mL, <i>p</i> = 0.020) volumes, 3D LV end-systolic volume (75.8 ± 9.2 vs. 67.4 ± 9.5 mL, <i>p</i> = 0.014), indexed 2D LV end-diastolic volume (67.6 ± 9.3 vs. 61.4 ± 8 mL, <i>p</i> = 0.042), and indexed 3D LV end-systolic (34.3 ± 3.8 vs. 31 ± 4.8 mL, <i>p</i> = 0.033) volume after the match were significantly higher in players with troponin increase. <b>Conclusions</b>: High-intensity contact activity, such as rugby, leads to acute changes in echocardiographic parameters, especially in athlete's who experience elevation in troponin.