"You are only as old as your spine is flexible" (Bob Harper: the trainer who is world famous from the reality show "The Biggest Loser")
The health of the spine is in relation with the health of your organs, and of course exercise.
Every one should be able to bend over and to touch the ground with the palms of his/hers hands.
Just try it and if you cannot do it, just try it every day a bit deeper, in a few months you will have restored the health of your spine.
A flexible body will give you a flexible mind.
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Pic Source:www.basingstokechiropractor.co.uk