It's important to replace beliefs that make you procrastinate with ones that will make you fit. Once you do, your subconscious will begin to change direction, and there will be very little struggle between mind and body.
We've heard it so many times that by now it certainly must be true: "If it didn't work out the first time, try harder." We're told that we'll get nowhere without taking action. That we can meditate all we want, but our action is what will actually make things happen.