As the rain stopped and the sun poked its face from behind heavy black clouds it had turned into a perfect night for running. However, As I used the first mile of the planned session of 7 miles fartlek to warm up my body started to protest. Firstly, both knees decided to complain, with pain across both kneecaps and moving up to the outer thigh of my left leg. This was followed closely by a pervading feeling of heaviness and general tiredness as I trudged along. As a result the intended fartlek turned into 7 miles steady.