Tratamiento para el pie de atleta

El Dr. Raysahelian propone un tratamiento para el pié de atleta (onicomicosis) que se basa en remojar los pies una solución de sulfato de magnesio (sales de Epsom) y mantenerlos bien secos.

Puede servir a todos los que vamos a gimnasios, piletas y lugares donde podemos contagiarnos los molestos hongos.

Vitamina D y rendimiento fisico

Niveles óptimos de vitamina D3 (colecalciferol) son importantes para el rendimiento físico.


"The active form of vitamin D is a steroid (actually a secosteroid) in the same way that testosterone is a steroid. It is also a hormone (hormone: Greek, meaning "to set in motion") in the same way that growth hormone is a hormone. Steroid hormones are substances made from cholesterol that circulate in the body and work at distant sites by setting in motion genetic protein transcription. That is, both vitamin D and testosterone set in motion your genome, the stuff of life. While testosterone is a sex steroid hormone, vitamin D is a pleomorphic steroid hormone.
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In Summary

Five converging—but totally separate—lines of scientific evidence leave little doubt that vitamin D improves athletic performance. There is actually a sixth line of evidence that i left out due to its complexity: the two studies I found on muscle strength and vitamin D receptor polymorphisms (genetic variations), both were positive. Anyway, the scientific evidence that UVB radiation, either from the sun or a sunbed, will improve athletic performance is overwhelming and the mechanism is almost certainly vitamin D production. Peak athletic performance will probably occur with 25OHD levels of about 50 ng/mL, a level that can be obtained through the use of supplements as well.
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A word of caution, though. The above studies suggest that taking too much vitamin D (more than 5,000 IU/day) may actually worsen athletic performance. So take the right amount, not all you can swallow. Take enough to keep your 25-hydroxyvitamin D levels around 50 ng/mL, year-round."


Peak Athletic Performance and Vitamin D


Ojo que las camas solares no dan UVB sino UVA que envejecen la piel y son dañinos.

El ejercicio breve aumenta la testosterona

El ejercicio incrementa el nivel de testosterona a los 40 minutos de iniciado (por ejemplo de correr), pero al sobreentrenar hasta la fatiga estos niveles bajan por lo que no lograremos masa muscular ni mejor rendimiento.

"Exercise elevates testosterone initially, but levels dramatically decrease with exercise sessions that progress toward fatigue. Plasma testosterone increases significantly from a mean basal value of 5.4 ng per milliliter to a peak of 8.76 ng per mililiter 40 minutes after the start of a run, and remains elevated for the duration of the run. Thus resting testosterone levels (4.55 ng per mililiter) were reached by two hours after discontinuation of the exercise. The suggestion is that shorter workouts raise testosterone and peak right at 40 minutes. Continuing an endurance workout to fatigue severely reduces testosterone remarkably. Repeated prolonged efforts may therefore deprive the athlete of testosterone�s performance-enhancing muscle rebuilding potential, reduce both rate of muscle growth and the pace rate dependant upon muscle torque output."

Journal of Endurance