Im 52 years old and I have Asthma.  Ive had several episodes where I feel light headed or couldnt breathe in the last couple of months.  Today, I worked out kind on the elliptical at our company gym.  Towards the end of my 30 minute workout I felt pressure in the right side of my head and felt like I was going to pass out.  I felt dizzy and confused for about 2 hours afterwards.
Hi, Thank you for asking question on Chat Doctor if you are having asthma the breathlessness Leeds to hypoxia, and it gives light headednesswhen you spent 30 minutes in gym naturally it leads to more hypoxia and confusion and dizziness you need oxygen inhalation, bronchodilator in consultation with your physician Hope this answer will serve your purposeTake care Chat Doctor. V. Subrahmanyam MD;Disassociate professor of pediatrics