As some of you know I ran London marathon 5 weeks ago after being diagnosed with systemic sclerosis and secondary raynauds in December. I am thinking of trying to complete an ultra marathon next year which is 62 miles from London to Brighton. I want to raise both money and awareness for scleroderma in the UK. I know it effects everyone differently but you guys have more experience than I. Do you think it's possible to run 62miles over 17 - 18 hours ? I run approx 20 miles a week cuttently.