Iowa’s fifth annual Burst Your Thirst Challenge through Live Healthy Iowa starts this week. The six week program encourages Iowans to focus on physical activity and hydration. Those who participate compete in an online competition tracking water consumption and minutse of activity. Last year 3,000 Iowans took part in the challenge representing 91 Iowa counties. They recorded 5.6 million ounces of water consumed and logged 4 million minutes of physical activity. Registration is still open until June 27 at www.livehealthyiowa.org.