It must be taken into account that yoga is very useful to slow down ageing, and if you practice it from an early age it is much better as you will be much better prepared for when you reach older adulthood, and this in various aspects such as physical and emotional. In reality the determinant of age from a philosophical point of view of yoga, is how flexible the spine is and not the number of years that the person has in itself. Several studies have concluded that yoga is very effective in maintaining and optimising muscle strength, balance and endurance, and flexibility.