Well one thing you have to understand, when u're trying to cut its going to be hard to see any growth. I think your split definitely needs some refining, sprinting is not going to work out your legs like an actual leg workout(squats,ham curls,calf raises,etc), and by using such high intensity you are likely to burn more muscle then fat. I would definitely suggest u look over your split carefully and make sure you have a more solid plan for cutting.