With only a few days to go until the Mont Blanc Ultra Trail race, pensioner Patrick Martin, at 74 the oldest participant, and pharmacist Charles de Monaghan, are busy training. The 170-kilometre super marathon which includes an elevation gain of 10,000 metres can take even skilled runners 40 hours to complete. (COMPLETES VID9LK9XG_EN, 9LL7EU)

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