| Autor: |
Carrasco F; Department of Nutrition, Faculty of Medicine, University of Chile, Independence 1027, Santiago 8380000, Chile., Arias-Tellez MJ; Department of Nutrition, Faculty of Medicine, University of Chile, Independence 1027, Santiago 8380000, Chile.; Department of Physical Education and Sports, Faculty of Sport Sciences, Sport and Health University Research Institute (iMUDS), University of Granada, 18071 Granada, Spain., Solar-Altamirano I; Free Sport Foundation, Los Acantos 1110 Depto. 102, Santiago 7550000, Chile., Inostroza J; Department of Nutrition, Faculty of Medicine, University of Chile, Independence 1027, Santiago 8380000, Chile., Carrasco G; Department of Nutrition, Faculty of Medicine, University of Chile, Independence 1027, Santiago 8380000, Chile. |
| Abstrakt: |
Objective: To compare the body composition of Chilean climbers of different performance levels and to determine the relation between the forearm and upper-trunk lean mass and the handgrip and upper-body traction strength, respectively. Methods: A cross-sectional study was carried out on thirty Chilean male adult climbers (26.1 ± 4.9 y.): nine of intermediate level (L1), eleven advanced (L2), and ten elite (L3). Through dual-energy X-Ray absorptiometry (DXA; Lunar Prodigy ® ), fat mass percentage (FM%), total lean mass (LM), forearm lean mass (FLM), and upper-trunk lean mass (UTLM) were measured. Total muscle mass (TMM) was also estimated. Handgrip strength (HGS) was measured with a Jamar ® dynamometer. Maximum upper-body traction strength (UBTS) was evaluated with a standardized movement. The level of climbing was assessed according to IRCRA rules. Results: No differences in FM%, total LM, UTLM, or TMM between the groups were found. Left and assistant FLM were significantly higher in L3 ( p = 0.047 and 0.041, respectively). HGS absolute, relative, and adjusted by FLM were not different between groups. FLM was associated with HGS in all segments ( p ≤ 0.001). UBTS absolute values, and as adjusted by TMM, were significantly higher in L3 ( p = 0.047 and p = 0.049, respectively). Conclusions: Left and non-dominant forearm lean mass were significantly higher in elite climbers. Handgrip strength was not significantly higher in elite climbers; however, the upper-body traction strength was significantly higher in elite climbers, independent of total or regional muscle mass. |
