The toughest footrace on earth - the Marathon des Sables (Marathon of the Sands) begins this year on the 26th March. Over six days, Sarah Frost, one of Motivation's physiotherapists, will join the runners as they face the equivalent of five marathons - a gruelling 254km in total, running through the extreme conditions of the southern Moroccan desert. Sarah is running to raise funds for Motivation. If Sarah’s personal challenge inspires you, please sponsor her by visiting www.justgiving.com/sarahfrost5. This is a UK site, however donations can be made via credit card from anywhere.