There are fitness trackers that read heart rates, count calories burned, track steps taken and measure hours asleep.

But what about hydration, one of the most essential factors in athletic performance? How many times have we seen a professional athlete cramp up and leave a game to receive IV fluids in the locker room? What if athletes and their trainers could easily monitor their hydration during competition?

Hartland engineer Russ Rymut, a former engineer and technology developer at General Electric and Honeywell International Inc., hopes he has the solution.

Read the full Milwaukee Journal Sentinel story here.