Composition corporelle mesurée par impédancemétrie segmentaire (BIAS) et performance de sprint chez les rugbymen

Conclusion Ainsi, cette technique nouvelle de BIA segmentaire fournit une détermination plus précise de la masse maigre et de la masse grasse chez les sujets minces et obèses, et fournit des mesures fortement corrélées avec la performance au sprint et au test de Gacon chez les rugbymen, mettant en évidence l’effet négatif d’un excès de masse grasse sur cette performance. Introduction We previously reported highly significant correlations between body cell mass (BCM) measured by BIA and aerobic capacity in rugby players. However, BIA loses precision in slim or heavy athletes due to limitations of the model that are overcome with segmental BIA. Synthesis of the facts We tested a new device using this approach, the RX4000 Biacorpus (Healthnesslink, France), that we validated first against DEXA and then applied to a team of rugby players. Validation in 96 subjects covering a range of BMI 13–48kg/m2 showed for fat mass (MG) a remarkable agreement (r =0.988; average error 0.532 [95% confidence interval, CI: −0.495; 1.56]) with DEXA. The composition of each segment is accurately predicted (r =0.823–0.958). In a team of 29 rugby players (age: 18–31yr; mean body mass index 29 (ranging from 21–41kg/m2), we found an average % of fat mass of 18,46% and muscle mass was on the average two-fold bigger than fat mass. However, neither muscle mass nor BCM measured with BIA were predictor of measurements of sprint performance, while the time of 10m sprint was strongl...
Source: Science and Sports - Category: Sports Medicine Source Type: research