Acta Biomedica Brasiliensia

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Authors: Ramon Martins Alves1; Roberta Sobreira; Joelen Soares de Castro; Paulo Vinícios Zovico; Wilkes de Oliveira & Victor Magalhães Curty

The heavy resistance strength training causes damage to the muscle structure that can be detected through indirect markers. OBJECTIVE. Examine whether there are changes in creatine kinase (CK), aspartate transaminase (AST) and alanine transaminase (ALT) activity with the resistance strength training in different intervals between sets and exercises. METHODS. Thirteen volunteers (± 21,8 years; ± 173,6 cm; ± 68,3 Kg) performed the one repetition maximum test (1RM) in the exercises: bench press, driven (pulley), sitting development, tríceps (pulley) and biceps. After seven days all were submitted a blood sample (PRE) and they performed 4 maximum sets by concentric failure with intensity the 85% of 1RM and intervals 1 and 3 minutes between sets and exercises. All returned to the same place 24, 48 and 72 hours after the after the session to another blood sample. Repeating the procedures after one week, but the volunteers who performed the test with an interval of 1 minute next week, they would keep the intervals of 3 minutes and vice versa. ANOVA was performed keeping as significant p<0,05. RESULTS. Was a significant reduction the number of repetitions in each set of all exercises with 1 and 3 minutes apart. There was a significant increase activity of serum CK and AST 24, 48 and 72 hours using both ranges. ALT did not change. CONCLUSION. The heavy resistance strength training caused increased activity of CK and AST but no differences with the intervals used. However, short intervals reduce the total volume of repeats.

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Authors: Fagundes, B.; van Tilburg, M.F.; Souza, G.V.; Caiado, J.R.C.; Barreto, M.A.P.; Silva, J.F.S.

Difficulties in obtaining equine frozen semen with potential fertility are recognized. This study was designed to investigate the effect of seminal plasma on frozen/thawing of eight stallion semen from different breed using the following treatments: Seminal plasma with ten-fold concentrated proteins with molecular weight above 10 kDa on frozen extender; Part of seminal plasma with proteins under 10 kDa on frozen extender; Conventional freezing, using whole seminal plasma on frozen extender. Using the parameter of 30% of seminal motility post-thawing as index of good freezability, it was verified an increased percentage of stallions that presented good freezability when semen was frozen with seminal plasma containing ten-fold concentrated proteins with molecular weight above 10 kDa on frozen extender. These results, suggested the use of seminal plasma concentrated proteins from own stallion to freezing/thawing semen.

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Authors: Karolina de Souza Paula & Denise Aparecida da Silva

The objective of this research was to evaluate milk production after administration of recombinant bovine Somatotropin (rBST) and verify aspects related to milk quality. A total number of 24 lactating dairy cows had its milk production evaluated during 23 days; the test group (n = 12) received two applications of rBST (interval of 14 days between each one). The Somatic Cells Count (SCC) and total fat in milk were evaluated. The results revealed that a single application of rBST increases about 19% the milk production while two doses (interval of seven days) increase approximately 27%. The average fat content in milk of the control-group cows was 1.4% and average SCC was 157,334 cells / ml of milk. The milk of the test-group female bovines showed average fat contents of 1.8%, 2.0% and 2.1% for the following periods: previous; after the first and after the second rBST administrations, respectively. In the same periods, SCC was equivalent to 156,000, 208,000 and 408.000/ml of milk. As a result, it can be concluded that rBST administration increases milk production, without any relevant increase in its fat content, and also promotes an increase in SCC numbers.

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Authors: Rhobert Gomes Frauches; Walace Érick de Medeiros Moura; Júlio Corrêa Campos; Silvani Barreto Assumpção Cardoso & Juliano Silva França

This study aimed to analyze quantitatively the rate of lower back pain in students in the eighth period of-the dentistry course of the UNIG campus V Itaperuna RJ, and evaluate their quality of life. In order to reach these objectives a questionnaire was used with questions such as gender, age, height, weight, lifestyle, types of instruments used during dental interventions, whether they feel constant pain or not, and a framework to accurately report where the pain is. In addition two self-assessment tools were used: the Roland-Morris questionnaire, to evaluate the actual severity and level of dis the impact of Lower Back Pain on the quality of life for student trainees. Photographs were also taken to examine the posture adopted by these students trainees during dental care, and these pictures were analyzed by a professional physiotherapist. Lower back pain is a major cause of absence from work for medical treatment, and one of the main factors leading to dental professionals taking early retirement. According to the interpretation of data obtained in this research field, the conclusion has been reached that lower back pain has not interfered significantly in the daily activities of dental students.