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Wrestling events included in the Olympic Games have different weigth classes. Most wrestlers reduce thir body weigth a few days before competition so they can enter the right weight category. Often they use irrational nutritional strategies to make the weight, sometimes even drastically reducing their water intake. The purpose of this study was the knowledge about influence of pre-competition level of hydration on mucle propperties in elite wrestlers.

Background Study Aim: Brazilian Jiu Jitsu (BJJ) is gaining thousands of practitioners in all countries; however, there is a lack of scientific research related to this sport. We wanted to establish the parameters approached by BJJ athletes to sporting excellence, which is the reason why we divided the subjects into two groups: experts and novices. Additionally, the aim of this study was to measure body composition, and to compare the performance of BJJ athletes focusing on two variables: isometric hand grip and explosive strength legs. Material Methods: Fifty six BJJ players, who were contestants in the European Open Jiu-Jitsu Championship 2013 in Lisbon (Portugal), took part in this study. Novice group (n=24; age: 29.9±5.8 yrs), Expert group (n=32; age: 30.5±4.7 yrs). Body mass was measured with Bioimpedance, and handgrip strength was measured with a dynamometer. Explosive strength leg was measured from a force platform with the Countermovement Jump (CMJ) test. Differences between experts and novices were established with the t Student?s test or Mann-Whitney U test for the parametric and non-parametric variables respectively. Results: Experts obtained significant differences over novices on isometric hand grip strength in both hands; as for the variables of CMJ, significant differences were found in Height of jump, peak power, velocity at peak power and average power. Conclusions: BJJ athletes with higher experience, training, and level (expert group) have more adaptations and improvements than the novice group. This can be seen by their higher records in isometric handgrip and the higher explosive strength in their legs. Keywords: Brazilian jiu jitsu, Countermovement jump, isometric handgrip, body composition, sport performance, force platform.

Background and aims The regular practice of physical activity to improve people´s physical condition such as running or jogging,can damage the lower limb in 79% of the people who practice it.The aim of this study was to determine if foot posture and gait can be modified after 45 minutes of running. Method The sample consisted in 116 healthy adults (92 men and 24 women) with non-pathological feet. The mean age of the participants was 28,31 ± 6,01 years, BMI of 23.45 ± 1.96 kg/m2 and training hours per week of 11.02 ± 4.22. Outcome measures were collected at baseline and after 45 minutes of running at an average speed of 12 km/h, and included the Foot Posture Index (FPI) and a pedobarography analysis with the system Biofoot(IBV, Valencia(Spain). Results The results show foot posture can be modified after 45 minutes of running. The FPI changed from 6,14 ± 2,61 to 4,86 ± 2,65. Furthermore, maximum pressure peak was reduced in the forefoot and increased in the midfoot..The pedobarometric measurement in the heel contact was reduced in the internal area of the foot.The average of maximum pressure was reduced in the internal area and in the forefoot. Conclusion The findings suggest that,after running, pronated foot tends to change its posture into a neutral position, and a decrease in maximum pressure forces in the forefoot and in the area internal the foot is presented. Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.