After starting running last year and doing the royal parks half marathon in October the natural progression was a marathon. I was following the runners world sub 4.00 training plan but began to suffer from very sore shins and calves. After taking some time off with no improvement I have been in physio for 3 weeks. I have only just begun to train lightly for the marathon on 25th April. I'm now starting to panic and worry which is also affecting my sleep patterns and concentration at work.