Several studies have demonstrated that dementia patients given structured exercise programs and occupational therapy have a less severe decline in activities of daily living and improved quality of life.

CNN: Better understanding of dementia leading to more effective therapies

The National Institute for Clinical Excellence recommends that patients with mild or moderate depression should follow a structured and supervised exercise programme of up to three sessions of exercise, each lasting 45-60 minutes, a week.

BBC: Depressed 'denied exercise help'

Psychiatrists, therapists, self-help books - everyone recommends good "sleep hygiene", regular exercise, structured social activities and, above all, taking your medication daily and on time.

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Whether it is faulty ratings on Worldcom, Enron, structured financial products, or MF Global, the failures of rating agencies to exercise due diligence have significantly affected markets.

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But it is not a straightforward exercise even to separate who is civilian and who is military personnel - the two forces are structured and organised completely differently.

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