Stewardship - my physical body

I don't usually lent, but I am going to fast from any food that could 'harm' my body more excessively than normal. I know ALL food given in extreme portions could cause a lot of bodily harm. So I am going to focus more so on fast-food, excessive meat, chips, candies, excessive alcohol, and soda. I know that's a lot, but I realized how obsessed I have become with food. In the end, I want to be a good steward with the body the Lord has given me. I need to care for it not only spiritually, but physically as well. I think that I have been focusing so much on caring for my 'spiritual life' that I absolutely neglected my physical. Nothing too fancy or 'spiritual' about this. I am simply going to start exercising more often, eat carefully, and sleep better.