Nunes João Pedro, Araújo João P M, Ribeiro Alex S, Campa Francesco, Schoenfeld Brad J, Cyrino Edilson S, Trindade Michele C C
Metabolism, Nutrition, and Exercise Laboratory, Physical Education and Sport Center, Londrina State University, Londrina 86057-970, Brazil.
Department of Physical Education, State University of Maringá, Maringa 87020-900, Brazil.
Sports (Basel). 2022 Feb 14;10(2):23. doi: 10.3390/sports10020023.
The present study analyzed the effects from day-before to day-of bodybuilding competition on intracellular water (ICW), extracellular water (ECW), total body water (TBW), and bioimpedance analysis (BIA) parameters (resistance, R; reactance, Xc; and derived scores) in bodybuilding athletes. We assessed anthropometry and BIA (foot-to-hand; tetrapolar; 50 kHz) in 11 male bodybuilders (29 ± 4 year-old; 81 ± 8 kg; 172 ± 7 cm; 27 ± 2 kg/m) both on the pre-competition day and on the contest day. Results revealed significant increases in ICW (31.6 ± 2.9 to 33.1 ± 2.8 L), with concomitant decreases in ECW (19.8 ± 1.8 to 17.2 ± 1.4 L) and TBW (51.4 ± 4.6 to 50.3 ± 4.2 L) from the day-before competition to contest day, which resulted in relatively large increases in the ICW/ECW ratio (1.60 ± 0.03 to 1.92 ± 0.01 L). Moreover, significant increases in R (391 ± 34 to 413 ± 33 ohm), Xc (64 ± 7 to 70 ± 6 ohm), and phase angle (9.3 ± 0.6 to 9.6 ± 0.7 degree) were observed between time periods. The phase angle scores reported on show-day of 9.6 and 11.2 appear to be the highest group mean and individual values observed in the literature to date. In conclusion, the strategies carried out on the final day of peak-week bodybuilding preparation lead to changes in BIA parameters and body water, with fluids shifting from the extra- to the intracellular compartment.
本研究分析了健美比赛前一天到比赛当天对健美运动员细胞内水（ICW）、细胞外水（ECW）、总体水（TBW）和生物电阻抗分析（BIA）参数（电阻，R；电抗，Xc；以及派生分数）的影响。我们在赛前一天和比赛当天对11名男性健美运动员（29±4岁；81±8千克；172±7厘米；27±2千克/米）进行了人体测量和BIA（脚到手；四极；50千赫）评估。结果显示，从比赛前一天到比赛当天，ICW显著增加（从31.6±2.9升增至33.1±2.8升），同时ECW（从19.8±1.8升降至17.2±1.4升）和TBW（从51.4±4.6升降至50.3±4.2升）减少，这导致ICW/ECW比值相对大幅增加（从1.60±0.03升至1.92±0.01升）。此外，在不同时间段观察到R（从391±34欧姆增至413±33欧姆）、Xc（从64±7欧姆增至70±6欧姆）和相位角（从9.3±0.6度增至9.6±0.7度）显著增加。在比赛日报告的9.6和11.2的相位角分数似乎是迄今为止文献中观察到的最高组均值和个体值。总之，在健美准备高峰期的最后一天所采取的策略导致了BIA参数和身体水分的变化，液体从细胞外转移到细胞内。
