Perda de peso e uso de suplementos em atletas de luta

Dica do Fabrício:
Sports Med Arthrosc Rehabil Ther Technol. 2011 Feb 12;3(1):4. [Epub ahead of print]
Patterns of weight loss and supplement consumption of male wrestlers in Tehran.
Kordi R, Ziaee V, Rostami M, Wallace WA.
ABSTRACT:
BACKGROUND: To evaluate the weight loss behavior of male wrestlers in Tehran.
METHODS: This study was a population-based cross sectional survey. Subjects were 436 wrestlers randomly selected from the wrestling clubs in Tehran employing cluster sample setting method. Subjects were interviewed based on a designed questionnaire. Body fat levels were measured based on skin fold measurements.
RESULTS: Weight loss methods practiced by 62% of all subjects during the previous year employing rapid ([less than or equal to]7days before the matches) and gradual (>7 days before the matches) weight reduction methods (73% and 34% of wrestlers who reduced their weight respectively). In addition, opinions on weight reduction, the methods of weight loss used, and the side effects of the weight loss practices as well as consumption of supplements among the subjects were reported in this study. The mean percentage of body fat of subjects was 15.9%.
CONCLUSIONS: Rapid weight loss for matches and the use of unsafe methods of weight reduction such as fasting, and fluid reduction methods as well as acute side effects of weight loss were prevalent among wrestlers in Tehran. Some preventive measures including education and new rules such as scheduling weigh-ins immediately prior to the competitions and mat-side weigh-in are needed to prevent these unhealthy practices. The weight loss behaviors of these wrestlers should be changed from using dehydration methods to using gradual methods of weight loss.

Artigo na PMS aborda EMG em karatecas

Percept Mot Skills. 2010 Dec;111(3):722-34.

Electromechanical delay in ballistic movement of superior limb: comparison between karate athletes and nonathletes.
Rodrigues Ferreira MA, Vences Brito A.
Sports Sciences School of Rio Maior, Polytechnic Institute of Santarém. marioarf@gmail.com
Abstract

The aim of the study was to analyze electromechanical delay in a ballistic movement of the superior limb. 10 male karate athletes and 9 nonathletes (without karate experience) performed a motor skill as fast and powerfully as possible, with impact on a makiwara (karate training instrument). For each participant, 10 choku-zuki performances were analyzed. Kinematics and surface electromyographic (EMG) activity of the anterior and posterior portions of deltoid, pectoralis major, latissimus dorsi, triceps brachii, and biceps brachii were recorded. Athletes had significantly shorter delay in arm flexion agonist muscles and significantly higher delay in arm flexion antagonist muscles and in forearm extension agonists. Results suggest that enhanced performance in athletes was mainly due to motor learning.