Effective Hydration keeps your mind and body working properly and it’s critical for optimal brain function and muscle performance. If you’re thirsty, you’re already dehydrated, which limits your ability to concentrate and lowers your performance on the course. Being dehydrated by just 2-3% results in 10% lower performance which in an average round of golf, could be as high as 8 shots! The Tour- pros take hydration very seriously and so should you.