Antecedentes: el dolor lumbar (DL) y el esguince de tobillo son lesiones muy prevalentes en los bailarines de ballet. Diferentes estudios relacionan ambas lesiones, por lo que se sugiere realizar una investigación al respecto. Objetivo: determinar si existe asociación entre el esguince de tobillo y la presencia de DL en bailarines de ballet mayores de 18 años en el último año. Diseño del estudio: transversal, analítico, prospectivo y observacional. Métodos: se contactaron a 114 bailarines de diferentes escuelas y compañías de ballet de Lima, quienes respondieron una encuesta online relacionada con la presencia de DL en los últimos seis meses, los esguinces de tobillo en los últimos 12 meses, y otras variables sociodemográficas (edad, talla, peso, índice de masa corporal - IMC, años practicando ballet, y horas de práctica a la semana); así como covariables de inestabilidad de tobillo, lesión en el miembro inferior, hiperlaxitud ligamentaria, entre otras. Resultados: 47 participantes se incluyeron en el análisis del estudio, donde el 61.7 % era de sexo femenino y presentaba una mediana de 22 años de edad. Asimismo, el 57.5 % presentaba DL; y el 25.5 %, esguince de tobillo en los últimos 12 meses. Al asociar las variables al DL se encontró una relación significativa (p<0.05) con peso, IMC e inestabilidad de tobillo. Aun así, no se confirmó una asociación entre el esguince de tobillo y el DL. Conclusión: los hallazgos proporcionan un alto porcentaje de presencia de DL y una asociación significativa con respecto a padecer de inestabilidad de tobillo. / Background: low back pain (DL) and ankle sprain are very prevalent injuries in ballet dancers. Different studies relate both injuries, so it is suggested to carry out an investigation in this regard. Purpose: to determine if there is an association between ankle sprain and the presence of DL in ballet dancers older than 18 years old in the last year. Study design: analytical, prospective, observational and cross-sectional. Methods: 114 dancers from different schools and ballet companies in Lima were contacted; these responded to an online survey related to the presence of DL in the last six months, ankle sprain in the last 12 months, and other sociodemographic variables (age, height, weight, body mass index - BMI, years practicing ballet, and hours of practice per week); as well as covariates of ankle instability, lower limb injury, ligament hypermobilty, among others. Results: 47 participants were included in the study analysis, 61.7 % of which were female and were a median age of 22 years old. Also, 57.5 % had DL and 25.5 % had an ankle sprain in the last 12 months. When associating the variables to DL, a significant association (p<0.05) with weight, BMI and ankle instability was found. Nevertheless, an association between ankle sprain and DL was not confirmed. Conclusion: the findings provide a high percentage of the presence of DL and a significant association with suffering from ankle instability. / Tesis

Made available in DSpace on 2016-01-26T12:51:26Z (GMT). No. of bitstreams: 1 luisdomingosfornitano_tese.pdf: 1565670 bytes, checksum: acedd7e7a18ad6dcdbdc6b72c97ae59d (MD5) Previous issue date: 2008-09-26 / Obesity is an independent risk factor for cardiovascular disease, especially in its morbid form. Bariatric surgery is an effective therapeutic option for sustained weight loss. However, there is no consensus in these cases regarding the performance of functional tests for preoperative evaluations. Objective: The aim of the present study was to analyze clinical, electrocardiographic and hemodynamic response variables using a conventional exercise test on individuals with morbid obesity in comparison to overweight individuals. Materials and Method: Six hundred seventeen cases were included. Group I had 290 patients with morbid obesity and Group II had 327 overweight patients. All were submitted to a conventional treadmill exercise test. Classic positivity criteria were used. Results: Both groups tolerated the test well. There was no statistically significant difference in terms of positivity of the test [ST segment abnormality or angor (p=0.3863) or ST segment abnormality alone (p=0.1000)]. The significantly higher values in the obese individuals were basal heart rate (HR), basal sistolic arterial pressure (SAP), maximum SAP, basal diastolic arterial pressure (DAP), maximum DAP, chronotropic incompetence (p<0.0001) and maximum double product (p<0.0421). The significantly lower values in the obese individuals were exercise time, maximum HR and METs values (p<0.0001). Conclusions: Hemodynamic parameters were significantly different between the two groups. However, there were no differences in terms of ST segment abnormalities or effort-induced angina. The very low functional capacity and complex arrhythmia found in some obese individuals draws attention to the need for complementary investigation with the aim of diminishing the risk of postoperative heart complications. / A obesidade é fator de risco independente para doença cardiovascular, particularmente em sua forma mórbida. A cirurgia bariátrica é opção terapêutica eficaz para o emagrecimento sustentado nesses casos não havendo, entretanto, consenso sobre a realização de testes funcionais para avaliação pré-operatória. Objetivo: Analisar as respostas clínicas, eletrocardiográficas e hemodinâmicas por teste ergométrico convencional, em portadores de obesidade mórbida em comparação a indivíduos com sobrepeso. Casuística e Método: Foram incluídos 617 casos sendo o Grupo I, com 290 pacientes obesos mórbidos e o Grupo II, com 327 pacientes com sobrepeso, todos submetidos a teste ergométrico convencional em esteira. Foram utilizados os critérios clássicos de positividade. Resultados: A prova foi bem tolerada por ambos os grupos. Não houve diferença estatisticamente significante em termos de positividade do Teste (por alteração do segmento ST ou angor) [P = 0,3863] ou somente por alteração do segmento ST [P= 0,1000]. As variáveis significantemente maiores nos obesos foram: Freqüência cardíaca (FC) basal, Pressão arterial sistólica (PAS) basal; PAS máxima; Pressão arterial diastólica (PAD) basal; PAD máxima; Déficit cronotrópico (P <0,0001) e o Duplo Produto (DP) máximo (P =0,0421). Os valores significantemente menores nos obesos foram: tempo de exercício, FC máxima e valores em METS (P<0,0001). Conclusões: Os parâmetros hemodinâmicos mostraram-se significantemente diferentes entre os dois grupos não havendo, porém, diferenças em termos de anormalidades do segmento ST ou angina induzida por esforço. A capacidade funcional muito baixa e as arritmias complexas observadas em alguns dos obesos alertam para a necessidade de investigação complementar no sentido de diminuir o risco de complicações cardíacas pós-operatórias.