Objective: This study aimed to identify the Electromyographic Threshold (EMGTh) during the dynamic Resistance Exercise, using visual and mathematical identification techniques. Methods and Results:We evaluated 14 male subjects (22.6 ± 2.1 years) who accomplished an incremental load protocol (10-10% of 1RM) in a half squat guided exercise. The intra-class correlation coefficient (ICC) was used to compare the EMGTh identification methods, in which high reproducibility value was obtained (0.835), confirmed by a moderately strong correlation of 0.721, in general, and yet a pairwise comparison by the Wilcoxon test, which was not identified any difference between the two methods (p> 0.05).

Inicialmente, gostaria de agradecer aos meus pais (Suzy e Manoel), sem o apoio incondicional de vocês este processo não seria tão incrível como foi. Nunca mediram esforços para que eu pudesse estudar, apesar de todas dificuldades. Agradeço aos meus irmãos e familiares, pelo carinho e preocupação de sempre. Também gostaria de agradecer à Pâmela e sua família, pelo suporte e companheirismo durante esse desafio.Agradeço ao professor Dr. Flávio de Oliveira Pires (Boss) pela orientação, ensinamentos e exemplos que levarei por toda a vida. Obrigado pelo companheirismo, amizade, e por tornar este período do mestrado prazeroso com muito aprendizado e amadurecimento. Agradeço também, por todas as incríveis oportunidades, especialmente, a visita técnica internacional realizada na University of Kent, na qual tive oportunidade de conhecer uma outra cultura e o laboratório do professor Dr. Alexis Mauger, no qual agradeço pela supervisão e ensinamentos.Não poderia deixar de agradecer ao Arthur Bossi, pela recepção, conversas no laboratório, sinuca e churrasco em pleno inverno inglês, que em pouco tempo, se tornou um amigo.Agradeço aos meus amigos do grupo de pesquisa (GEPsE), que são a minha segunda família. Em especial ao Paulo (Lobinho), Cayque (Batman), Ítalo (Duracell) na GEPsE-House.

The aim of this study was to examine the influence of the type of beverage and the use of thirst sensation to guide fluid replacement in the adolescent judokas. Methods: Nine male judokas aged 10-16 (average age 11,8 ± 4,0 years old) were submitted to a standardized training of 90 minutes. In the first phase of the study, the athletes completed the training with ingestion ad libitum of different beverages: day 1 (water) and after 48 hours, day 2 (sports drink). In the second phase, after 7 days of first stage, the athletes completed the training with ingestion of water or sports drink, guided by thirst sensation. The total volume of liquids ingested (VI) during the training was quantified and the level of dehydration was determined by variation of body weight before and after training (∆W). At the end of each training, the athletes were asked about the training intensity to determine perceived exertion (PE). Results: No differences were observed in weight loss (∆W) (range:-0,04 ± 0,4 to-0,69 ± 1,1 %) and perceived exertion (range: 3,2 to 5,0). The use of thirst sensation to guide fluid replacement reduced the total fluid intake when the beverage offered was the sports drink (no thirst vs. thirst sensation, 521,1 ± 290 vs 152,2 ± 187 mL-p=0,006). Conclusion: The results suggest that fluid replacement guided by thirst sensation can be influenced by the type of beverage offered.