Yoga and Physical Hygiene :-
The psycho-physiological aspect of yoga is of profound importance. This ancient science never regards man as a mere biological entity. The ancient thinkers paid great attention to the functioning of the mind and the inner mechanism. Today, psychology has also accepted the basic aspect in its scope of investigation and is increasingly recognizing the correlation between the body and the mind.
Patanjali has reaffirmed the technique of ashtanga yoga in both aspects - technically knows as Bahiranga (external) and Antarang (internal) - for the perfection of yoga. Those that fall into the first category are Yama, Niyama , Asana and Prayanama. Those classed in the second category are Pratyahara (Withdrawal or control of the sense), Dharana (Concentration), Dhayana (Meditation) and Samadhi (Super conscious state of the self-equilibrium).
Asana, Mudra (Balancing exercise and inner attitudes) and Pranayama are the main techniques which are followed to keep the physical system fit and healthy. These form are main supports for health, for yoga requires long and steady practice in one sitting posture.
Asanas are the postures; they are not merely physical exercise that affect the muscular system. In yoga, muscular strength has not much importance and the body is only an instrument.
Fatigue, exhaustion, sloth, etc, are avoided in yoga practice. The attempt is always to keep the mind cheerful. The asanas constitute a technique which, when practiced daily, re-tones and revitalizes the whole human system.
Thus Yoga has a substantial contribution to make to, and a scientific and potent part to play in, the field of physical hygiene.