If you have applied and got a space for the London Marathon this year, well done. You will be training hard through all this bad weather and I expect your body is aching and tired. I have worked with many marathon runners over the years and can help you too. Along with your tight hamstrings, aching quads, painful calf muscles. I expect your lower back is giving you some discomfort too, and don't forget about your shoulders. It might be your legs with are hitting the ground, but your shoulders are powering you through each stride. Tight hip's are also a common side effect to the shear amount of miles you are running too. Tight hip flexors can lead to - Lower back pain, hip pain, hamstring pain, shoulder pain. Running a marathon is serious stuff, be sure to look after yourself so that you can get to the finish line without injury.