Right ventricle best predicts the race performance in amateur ironman athletes
| Autor: | Beat Knechtle, Alain Bernheim, Anja Faeh-Gunz, Christine H. Attenhofer Jost, Argelia Medeiros-Domingo, Monica Pfyffer, André Linka, Gabriella De Pasquale, Michel Zuber, Burkhardt Seifert |
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| Rok vydání: | 2013 |
| Předmět: |
Adult
Male medicine.medical_specialty Heart Ventricles Physical Therapy Sports Therapy and Rehabilitation Athletic Performance Race (biology) Endurance training Internal medicine medicine Humans Orthopedics and Sports Medicine Exercise Ultrasonography biology Anthropometry business.industry Athletes Middle Aged biology.organism_classification Confidence interval Weak correlation medicine.anatomical_structure Fractional area change Ventricle Cardiology Body Composition Physical Endurance Female business Switzerland |
| Zdroj: | Medicine and science in sports and exercise. 45(8) |
| ISSN: | 1530-0315 |
| Popis: | PURPOSE The ironman (IM) triathlon is a popular ultraendurance competition, consisting of 3.8 km of swimming, 180.2 km of cycling, and 42.2 km of running. The aim of this study was to investigate the predictors of IM race time, comparing echocardiographic findings, anthropometric measures, and training characteristics. METHODS Amateur IM athletes (ATHL) participating in the Zurich IM race in 2010 were included. Participants were examined the day before the race by a comprehensive echocardiographic examination. Moreover, anthropometric measurements were obtained the same day. During the 3 months before the race, each IM-ATHL maintained a detailed training diary. Recorded data were related to total IM race time. RESULTS Thirty-eight IM finishers (mean ± SD age = 38 ± 9 yr, 32 men [84%]) were evaluated. Total race time was 684 ± 89 min (mean ± SD). For right ventricular fractional area change (45% ± 7%, Spearman ρ = -0.33, P = 0.05), a weak correlation with race time was observed. Race performance exhibited stronger associations with percent body fat (15.2 ± 5.6%, ρ = 0.56, P = 0.001), speed in running training (11.7 ± 1.2 km · h(-1), ρ = -0.52, P = 0.002), and left ventricular myocardial mass index (98 ± 24 g · m(-2), ρ = -0.42, P = 0.009). The strongest association was found between race time and right ventricular end-diastolic area (22 ± 4 cm2, ρ = -0.64, P < 0.0001). In multivariate analysis, right ventricular end-diastolic area (β = -16.7, 95% confidence interval = -27.3 to -6.1, P = 0.003) and percent body fat (β = 6.8, 95% confidence interval = 1.1-12.6, P = 0.02) were independently predictive of IM race time. CONCLUSIONS In amateur IM-ATHL, RV end-diastolic area and percent body fat were independently related to race performance. RV end-diastolic area was the strongest predictor of race time. The role of the RV in endurance exercise may thus be more important than previously thought and needs to be further studied. |
| Databáze: | OpenAIRE |
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