I would like to know since how long you are into exercising ? If you are new with it and overdoing it , more than your capacity ,occasionally , you might experience such symtoms . In fact , when we work out , we are influenced by animea ,dehydration, low blood sugar levels, low/ high BP overexertion, and, quite possibly, heat exhaustion . Lack of sleep ,stress ,worry can also put you in this condition . Try to remove causes and help increase immunity to lead healthy life . Start with slow motion and gradualy excel . Relax after every step Do Yoga ,Pranayam ,Deep breathing - Inhale as deep as possible - Hold - Exhale -Hold - help to re-expand lungs help detoxing the inner system and boosting the energy by providing sufficient oxygen . Take break whenever you feel losing control Take care of your life style & food habits . Keep yourself well hyderated , Sleep well , Eat healthy balanced diet . If the problem persist ,Consult your doctor .