More miles in the bank. Adding core intervals to my running is already making a big difference to how I feel and on top other that I cam see HIIT being a great addition too. Pain I’d had in the top of my hips has gone and that was my only niggle. Amazing. Thanks @thebodycoach for your YouTube sessions. #marathon #marathontraining #corestrength #hiit #nopainnogain http://ift.tt/2j04lSS