55 páginas : ilustracionesLas nuevas tendencias del entrenamiento son una manera efectiva para desarrollar la zona muscular media del cuerpo humano, actualmente conocida como Core. Esta investigación demuestra el uso del entrenamiento funcional con el propósito de desarrollar la resistencia en la zona media muscular en adultos de 25 a 30 años de edad; para esto se tomó una muestra de catorce personas, tres hombres y once mujeres, todos usuarios del mismo centro de entrenamiento, y diferentes profesiones donde se demandan posiciones y posturas durante un tiempo prolongado. Se aplicó un plan de entrenamiento de cuatro semanas y se utilizaron ejercicios propioceptivos y unilaterales, ambos enfocados a la higiene postural mediante una estructura de entrenamiento gradual en su intensidad, volumen y descanso, buscando que haya un desarrollo de la resistencia muscular sobre la zona media, y un efecto inmediato sobre el balance muscular y la prevención de lesiones.New training trends are an effective way to develop the middle muscular area of the human body, currently known as Core. This research demonstrates the use of functional training with the purpose of developing resistance in the middle muscular area in adults aged 25 to 30 years; This requires a sample of people, three men and once women, all users of the same training center, and different professions where positions and positions are demanded for a long time. A four-week training plan was applied and proprioceptive and unilateral exercises were used, both focused on postural hygiene through a gradual training structure in its intensity, volume and rest, looking for a development of muscular endurance on the middle zone , and an immediate effect on muscle balance and injury prevention. An average improvement of difference of +4 "and +2" was observed in the different exercises, so that the adaptations provided by the core training with short time methodologies in intensity and frequency, are linked not only to muscular endurance, but also to the forceIncluye bibliografía