Pain = Results
Do you want the "hard work" more than you want the result? How about the pain more than the pleasure? If you desperately desire that shiny new car, you need to desperately desire the hard work it takes to get that car.
Humans are built to push the easy button, to "conserve energy", take the path of least resistance and move away from pain. However, it's pain/hard work that brings about the results we desire.
So go ahead and take an extra lap, put up a few more reps, make a few extra sales calls or initiate that difficult conversation - results are just around the corner.