If an outdoor runner develops a headache, feels tired, and has an elevated heart rate, what is the most probable cause?
a. overhydration
b. insufficant calories
c. lack of protein
d. dehydration

Good Morning! The symptoms of the professional runner may be linked to dehydration condition. When the body feels the need for water and does not have it, it begins to provide uncomfortable symptoms, such as: dizziness, fatigue, diarrhea, drowsiness, headache, tachycardia and so on. In addition, of course, the most obvious symptoms: thirst and dry mouth. letter d). Hugs!