I read in many sites including here that practicing brahmacharya gives health and its true. But its true in youngsters or beginners. For the advandced person of any spiritual tradition it seems it doesnt do much difference. Like the sage Ramana Maharshi suffered the same weaknesses that any other common old person. There was a famous monk Padre Pio who could do many miracles of bilocation but he used a wheelchair because of arthritis and an hernia and was not that old. SUffering illness even from his childhood http://en.wikipedia.org/wiki/Pio_of_Pietrelcina#Poor_health. SO there is change in youngsters but not in advandced practionner, why?
Answer That which is a part of 'Prarabdha Karma' (karma destined to work out in this existence) cannot be side stepped, even as regards the realized sage. That remnant effect of past deeds is to be worked out.
ॐ तत् सत् (That Supreme being is the absolute truth)
Questions concerning the practice of 'Brahmacharya' to know the self, & the means required are dealt with here.
The term 'Yoga' is a derivative of the Samskruth verb 'Yuj' which refers to union. 'Yoga', also called 'Brahma vidy‚' is the eternal dissolution of the individual 'Aham' (Ego) into the Atman (self) for 'Mukti' (liberation).
Mere indulgence in '¬sana' or physical postures is not Yoga. ¬sana is only one limb or 'Anga' of Yoga. The eight limbs viz. Yama, Niyama, ¬sana, Pr‚n‚y‚ma, Praty‚h‚ra, Dh‚rana, Dhy‚na and Sam‚dhi are the means to Yoga. Brahmacharya or spiritually based continence is one of the important components of 'Yama'. 'Brahmacharya':- "Brahmani charyathey ithi" - "To surrender one's Ego and go with the will of the Almighty."