Many people feel that when they haven’t worked out for short period of time that they have lost so much physically. The reality is that the body doesn’t lose its gains so quickly. What does happen is that the brain loses it’s acceptance to the physical pains that go into a workout! So just like hands can get a callous due to certain labor…over time if that labor doesn’t continue it will go away.
In short, you need to retrain the mind to the pains of a workout! The body will follow..