Looking to up your training game?
It's true. The more we do the same things, the less impact it has on our bodies. Being the amazing machines that they are, your body adapts to the routine YOU adopt and it becomes more efficient. It's at this point where training starts to minimize in positive impact.
However, if you consistently challenge yourself toward accomplishing different things, you can ALWAYS stay in shape. Check out this post from Justin Moser of http://www.active.com/. It lists some great ideas how you can get outdoors and enjoy good weather, but still train doing different activities.