Performance coach Leisbeth Pauwels sees it all the time: Golfers don’t take hydration seriously. If you’re not drinking enough, you’re putting your body at risk. Dehydration causes headaches, can make you feel dizzy, and fatigued. These physical symptoms are hard to miss, but before your body starts to show it’s in trouble, there are subtle mental symptoms that appear first. “Hydration is very overlooked,” Pauwels, who works with LPGA and LET golfers, says.