CONCENTRIC AND ECCENTRIC ISOKINETIC STRENGTH PROFILE OF SHOULDER ROTATORS IN ELITE JUNIOR TENNIS PLAYERS

The purpose of this study was to evaluate concentric (con) and eccentric (ecc) isokinetic strength of shoulder rotators in elite junior tennis players. Shoulder rotator strength was measured bilaterally in 40 junior tennis players (26 male and 14 female) at 60 and 180°/s. Dominant internal rotation (IR) strength development was found for both sexes. Boys also had a dominance effect in the external rotators (ER) in both modes. This discrepancy between sexes also was evident in the unilateral strength ratio (ERcon/IRcon), with girls within the normal range and boys at a recommend level. In both sexes, the functional ratios (ERecc/IRcon) were lower than the ideal to prevent joint overloading. Exercises involving concentric and eccentric strengthening of external rotators are necessary to restore shoulder imbalances, especially for females tennis players

Effect of hyperbaric oxygen therapy combined with autologous platelet concentrate applied in rabbit fibula fraction healing

OBJECTIVES: The purpose is to study the effects of hyperbaric oxygen therapy and autologous platelet concentrates in healing the fibula bone of rabbits after induced fractures. METHODS: A total of 128 male New Zealand albino rabbits, between 6-8 months old, were subjected to a total osteotomy of the proximal portion of the right fibula. After surgery, the animals were divided into four groups (n = 32 each): control group, in which animals were subjected to osteotomy; autologous platelet concentrate group, in which animals were subjected to osteotomy and autologous platelet concentrate applied at the fracture site; hyperbaric oxygen group, in which animals were subjected to osteotomy and 9 consecutive daily hyperbaric oxygen therapy sessions; and autologous platelet concentrate and hyperbaric oxygen group, in which animals were subjected to osteotomy, autologous platelet concentrate applied at the fracture site, and 9 consecutive daily hyperbaric oxygen therapy sessions. Each group was divided into 4 subgroups according to a pre-determined euthanasia time points: 2, 4, 6, and 8 weeks postoperative. After euthanasia at a specific time point, the fibula containing the osseous callus was prepared histologically and stained with hematoxylin and eosin or picrosirius red. RESULTS: Autologous platelet concentrates and hyperbaric oxygen therapy, applied together or separately, increased the rate of bone healing compared with the control group. CONCLUSION: Hyperbaric oxygen therapy and autologous platelet concentrate combined increased the rate of bone healing in this experimental model.Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)Universidade Federal do Vale do Sao Francisco Colegiado de MedicinaUniversidade Federal de São Paulo (UNIFESP) Departamento de CirurgiaUniversidade Federal do Vale do Sao Francisco Colegiado de Medicina VeterinariaSociedade Brasileira de Traumatologia Esportiva e ArtroscopiaUNIFESP, Depto. de Cirurgia104698SciEL

Effect of hyperbaric oxygen therapy combined with autologous platelet concentrate applied in rabbit fibula fraction healing

OBJECTIVES: The purpose is to study the effects of hyperbaric oxygen therapy and autologous platelet concentrates in healing the fibula bone of rabbits after induced fractures. METHODS: A total of 128 male New Zealand albino rabbits, between 6-8 months old, were subjected to a total osteotomy of the proximal portion of the right fibula. After surgery, the animals were divided into four groups (n = 32 each): control group, in which animals were subjected to osteotomy; autologous platelet concentrate group, in which animals were subjected to osteotomy and autologous platelet concentrate applied at the fracture site; hyperbaric oxygen group, in which animals were subjected to osteotomy and 9 consecutive daily hyperbaric oxygen therapy sessions; and autologous platelet concentrate and hyperbaric oxygen group, in which animals were subjected to osteotomy, autologous platelet concentrate applied at the fracture site, and 9 consecutive daily hyperbaric oxygen therapy sessions. Each group was divided into 4 subgroups according to a pre-determined euthanasia time points: 2, 4, 6, and 8 weeks postoperative. After euthanasia at a specific time point, the fibula containing the osseous callus was prepared histologically and stained with hematoxylin and eosin or picrosirius red. RESULTS: Autologous platelet concentrates and hyperbaric oxygen therapy, applied together or separately, increased the rate of bone healing compared with the control group. CONCLUSION: Hyperbaric oxygen therapy and autologous platelet concentrate combined increased the rate of bone healing in this experimental model