Consider how you do the 4 basics drills. Take for example the sit up and note how the first one when you chance your position is different from the next. Note if you are keeping yourself tense to make the work swifter and less of a transition ? Work on relaxing on the ground every time just like in the first time and learn to use all of your body to do the work.
It is possible that you will tire faster due to the changed states of tension you will learn but that will prepare you better for the ever changing and never repeating style of life itself. There is a lesson to be learned there.
And smile. It makes everything simpler and easier.