After too many days of running on wet, soggy trails and being whipped by the wind, it is nice to finally feel the warmth of the sun. With the weather forecast predicting more sunny days ahead of us, many people will be planning to get outside and enjoy a workout or two. But although we are still in the last days of the Spring and the temperatures are mostly mild, now is the perfect time to start thinking about hydration. Ensuring that you are sufficiently hydrated while running will not only keep you cool and comfortable. It can make the difference between finishing a workout, crossing a finish line or crashing out in a big heap and a DNF.