Considerando las especificidades y principios del método Pilates,el presente estudio tiene como objetivo desarrollar y validar un sistema de observación que permita observar los comportamientos de instrucción de instructores de Fitness en la actividad Pilates, (SOIIF-PILATES), a partir de la adaptación de un instrumento ya existente. Después de varios procedimientos metodológicos para probar la funcionalidad del instrumento, el SOIIF-PILATES creado demostró presentar validez y fiabilidad siendo constituido por dos criterios/dimensiones (momento y contenido) y 15 categorías. Se realizó también una aplicación piloto del instrumento en una muestra de 15 instructores en la actividad de Pilates que permitió caracterizar su intervención, así como compararla con las fases de la clase (calentamiento, parte fundamental y relajación/estiramiento) y del ejercicio (antes, durante y después del ejercicio). Los resultados del estudio piloto demostraron que la mayoría de las categorías mencionadas por las instructoras se ajusta a los principios de Pilates, lo que puede justificar su elevada utilización. Se encontraron diferencias en el total de la instrucción en las diferentes fases de la clase y entre las diferentes fases de la clase y el ejercicio. Considering the specificities and principles of the Pilates method, the present study aims to develop and validate an observation system that allows us to observe the instructional behaviors of Fitness instructors in the Pilates activity (SOIIF-PILATES), based on the adaptation of an instrument that already exist. After several methodological procedures to test the functionality of the instrument, the SOIIF-PILATES proved to be valid and reliable, consisting of two dimensions (moment and content) and 15 categories. A pilot application of the instrument was also carried out in a sample of 15 Fitness instructors of  the Pilates activity, which allowed to characterize their intervention as well as to compare it in different phases of the class (warm-up, main part and relaxation/stretching) and in different parts of the exercise (before, during and after the exercise) The results of the pilot study reveal that most of the categories referred by the instructors are following the principles of Pilates, which may justify their high utilization. Differences were found in the total of instruction of the different phases of the class and between the different phases of the class and the different phases of the exercise. Considerando as especificidades e princípios do método Pilateso presente estudo tem como objetivo desenvolver e validar um sistema de observação que permita observar os comportamentos de instrução dos técnicos de exercício físico na atividade de Pilates, (SOIIF-PILATES), a partir da adaptação de um instrumento já existente. Após diversos procedimentos metodológicos para testar a funcionalidade do instrumento, o SOIIF-PILATES demonstrou apresentar validade e fiabilidade, sendo constituído por 2 dois critérios/dimensões (momento e conteúdo) e 15 categorias. Foi também realizada uma aplicação piloto do instrumento numa amostra de 15 técnicos de exercício físico na atividade de Pilates que permitiu caracterizar a sua intervenção assim como compará-la relativamente às fases da aula (aquecimento, parte fundamental e relaxamento/alongamento) e do exercício (antes, durante e após o exercício). Os resultados do estudo piloto demonstraram que a maioria das categorias referidas pelos técnicos de exercício físico estão de acordo com os princípios da modalidade de Pilates, o que pode justificar a sua elevada utilização. Foram encontradas diferenças no total da instrução nas diferentes fases da aula e entre as diferentes fases da aula e do exercício.

A 15-year-old girl was admitted to emergency department with an acute flaccid tetraparesis with no other symptoms. A history of recurrent similar episodes with spontaneous recovery was reported and no family history was known. Laboratory tests revealed severe hypokalaemia and hypokaluria. Symptoms resolution occurred after potassium replacement. The diagnosis of hypokalaemic periodic paralysis (HPP) was confirmed by genetic testing, which revealed a not previously described mutation in CACNA1S gene (c.3715C>G p.Arg1239Gly). HPP is a rare neuromuscular disorder that causes episodic attacks of flaccid paralysis with concomitant hypokalaemia. Primary forms of the disease are skeletal muscle ion channelopathies. HPP occurs due to a problem in potassium distribution rather than a total body potassium deficiency. Therefore potassium replacement should be carefully performed because of the risk of rebound hyperkalaemia. Knowing this rare entity is important in order to avoid diagnostic delays and so that proper treatment can be initiated to reduce morbidity and mortality.

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Membranoproliferative glomerulonephritis is a rare chronic glomerulonephritis in pediatric age. It may be a primary disorder or secondary to other chronic diseases. Diagnose of membranoproliferative glomerulonephritis is based on specific kidney biopsy findings. The prognostic factors, the outcome and the most suitable treatment regimen are incompletely known in children. We report a case of a 3-year-old boy that presented with nephritic/nephrotic syndrome and hypocomplementemia. After 10 days under corticosteroid therapy, he maintained worsening of renal function and a renal biopsy specimen revealed a membranoproliferative glomerulonephritis. Autoimmune disease and infections were initially excluded, but further investigation revealed positive Polymerase Chain Reaction for cytomegalovirus in blood and urine. Cytomegalovirus genome at biopsy was not identified. He completed six months of treatment with valganciclovir and corticosteroids with total remission of proteinuria and undetected viral loads. With this case, we would like to draw attention to a type of nephropathy that is rare in childhood.