Hello there I have just started training for my first marathon. I'm a competent 10km runner and have done a couple of half marathons. Up until now I have been a keen gym goer, particularly for two circuits classes which focus mostly on strength building for the legs. I am using a marathon training plan from the Bupa website which has me running four days a week with three rest days. What I'm wondering is if it is a good idea to keep up my circuits classes as well as doing my four days running a week? One class would be on a run day and the other would be on a rest day. Any thoughts/advice would be greatly appreciated. Thanks.