El objetivo del Estudio tuvo por finalidad relacionar los cambios en la capacidad física y la ansiedad. Participaron 30 pequeños gimnastas principiantes de ambos sexos, cuyas edades fluctuaban entre los 5 y 9 años. Se utilizaron medidas antropométricas y una prueba de esfuerzo; la ansiedad fue evaluada a través del Inventario de Ansiedad de Estado Competitivo 2 (IAEC 2) luego de 8 meses de entrenamiento gimnástico. Los resultados de-muestran una correlación estadísticamente significativa entre los procesos de recuperación cardíaca y la ansiedad cognoscitiva.

This paper uses an original experimental model to determine the validity of the hypothesis of humoral natriuretic factor. Small doses of Dog plasma is injected with expansion to other receptors VEC dogs, directly into the left renal artereia. Physiologism of the experimental and contralateral kidney was studied. The results support the hypothesis of that "third factor", they show an apparently independent diuretic and natriuretic action of discrete changes in renal plasma flow and glomerular filtration. The possibility of a reflex nervous mechanism given the contralateral response similar to the experimental kidney arises.

It reviews the publications related with sexual maturity process and factors that, in some way, affect it. It studies a population of 1570 women from Lima and 189 from Arequipa, of different socioeconomic level, with ages from 12 to 48 years. The results allow the assertion that the socioeconomic level -that it is expressed in the nutritional state- is a fundamental factor in the sexual maturity process and the reproductive function. The secular trend to an earlier age of menarche has not yet arrived to the point expected due to the genetic factor. The results are compared with those of a north european women's population. It shows that moderate physical activity improves the reproductive function and that, to the present time, the age of menarche is earlier - or at least not lates- in Arequipa then in Lima City. These results put on second place the importance of the geographic altitude...