<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hello Doctors, I am 30, 169 cms, 80Kg, Somewhat Obese on Belly, but my hands legs are not that fat. I get period motivations to workout and I start working out. moderately, usually do brisk walking cycling or 10 count aerobics, many times I get some heaviness in my head after 10-12 min of workout, I get scared and then I leave it. that heaviness lasts 10-30 mins or even sometimes for 2 hrs. Can u help me how to avoid this heaviness in head why I am getting this. I have had many tests before, and they were normal. i have slight cervical PIVD and Lumber L5 S1 PIVD also.  <response>: Hi sir the reason behind getting heaviness in head during workout is build up of carbon dioxide pressure lactic acids accumulation, another reason is you have cervical pied which aggravates situation by not supplying proper oxygen to nerves. I suggest you to do proper warm up cool down exercises, slowly build intensity of workout weekly, dont do exercises which strain neck. HY Chat Doctor. Do exercises in properly ventilated area. 