PPG - Medicina Translacional
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Navegando PPG - Medicina Translacional por Autor "Andrade, Marilia Dos Santos [UNIFESP]"
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- ItemAvaliação dos músculos flexores e extensores de joelho de atletas de corrida, ciclismo e triatlo por dinamometria isocinética(Universidade Federal de São Paulo (UNIFESP), 2019-04-25) Peres, Beatriz Da Silva [UNIFESP]; Andrade, Marilia Dos Santos [UNIFESP]; http://lattes.cnpq.br/8618739762906389; http://lattes.cnpq.br/8959714470667245; Universidade Federal de São Paulo (UNIFESP)Objective: To evaluate and compare peak torque and knee muscle balance ratios, as well as the bilateral difference in the quadriceps and hamstring muscles among runners, cyclists, and triathletes of both genders. Methods: The isokinetic peak torque of quadriceps and hamstring muscles of 50 athletes (33 males and 17 females) were evaluated using an isokinetic dynamometer at 60 and 240º.s-1. The hamstring to quadriceps (H:Q) conventional balance ratio, H:Q functional ratio, and strength symmetry were calculated. Results: There was no difference in peak torque relative to the total body mass between the sports modalities, however, the male of the tree sports present values significantly higher (p < 0.05) than female. Female runners had a significantly higher H:Q functional ratio (1.7 ± 0.4) than male runners (1.3 ± 0.3) and female triathletes (1.3 ± 0.1) (p = 0.04). There was no difference in the H:Q conventional balance ratio among sports or between genders, since there was no bilateral asymmetry of the quadriceps and hamstring muscles. Conclusion: The H:Q functional ratio was higher in female runners than in male runners and female triathletes, which indicates a greater eccentric strength of the knee flexor muscles relative to the concentric force of the extensor muscles. The results exhibit in this present study can be used to direct works of strengthening and rehabilitation of runners, cyclists and triathletes.
- ItemFatores determinantes do desempenho de jovens nadadores em provas de 100 e 400 metros de nado livre(Universidade Federal de São Paulo (UNIFESP), 2019-05-30) Seffrin Neto, Aldo Antonio [UNIFESP]; Andrade, Marilia Dos Santos [UNIFESP]; Lira, Cláudio André Barbosa de [UNIFESP]; http://lattes.cnpq.br/3289964716112944; http://lattes.cnpq.br/8618739762906389; http://lattes.cnpq.br/5035421677780773; Universidade Federal de São Paulo (UNIFESP)Swimming is a very popular sport especially amongst young people. It is known that swimming performance is influenced by several factors, such as anthropometric and physiological aspects. However, the level of relative contributions of these variables to swimming performance in different age groups is not clear. Therefore, the aim of the present study was to analyze the characteristics of aerobic endurance, anthropometry and neuromuscular fitness to fit a multiple regression model to verify which factors better explain performance in 100- and 400-meter freestyle swimming events in each age group. Sixty swimmers from both sexes participated in the study (13.80 ± 2.61 years old, 1.62 ± 0.10 m, 52.36 ± 12.01 kg). They were divided into three groups: 11 to 12 years old (G1), 13 to 14 years old (G2) and 15 to 23 years old (G3), further subdivided by sex. Initially, the relationships were analyzed by dispersion diagrams and Pearson's linear correlation coefficients. Then, Stepwise multiple regression models were fitted to determine the relationships between anthropometric variables, critical velocity, handgrip strength, vertical jumping power and height, muscle torque and power of knee flexor and extensor muscles and internal and external rotators of the shoulders, age, sex and biological maturation. Results show that the parameters independently contribute to the stepwise prediction model of performance and that the models differ between the three age groups. Critical velocity is an important variable in both events for all age categories. Both lean mass and muscular power were performance determinants for G2 & G3 and muscular strength for G3. The understanding of these variables can contribute to the development of proper training programs for each age group, identify athletic talents and direct athletes to the events for which they have a more adequate physical and physiological profile.