 The Power of Prevention with Dr. Dave Janda is brought to you by the Institute for Preventative Sports Medicine. One of the most common medical issues that can arise in a sporting scenario, recreational activity or working around your home is dehydration. The signs to watch out for, folks, are the following. Fatigue, inattention, clumsiness and lightheadedness. Folks, if these symptoms arise, you must stop what you are doing immediately.