Hi welcome to HCM Feeling of shortness of breath and dizziness is no doubt disgusting and a matter of concern .High blood pressure is one of the factors but in your case it is under control , so this factor can be ruled out. For your info , Anemia, a lack of red blood cells, also can cause , weakness, dizziness, shortness of breath or headache and more. Low blood pressure, or hypotension, can make you feel lightheaded and dizzy . Over exertion while exrcising and Dehydration also causes feelings of dizziness. This temporary dizziness usually clears up when your fluid balance returns to normal . I would like to suggest you to ascertain the cause of your problem try to remove it . Headache, dizziness and lack of energy are the symptoms of post workout fatigue, when the diet is not proper. if intensity of your physical exercise has increased, then there must be inxrease in the diet also, failing which, these symptoms will persist. You should keep in mind that without inclusion of proper balanced diet containing all essential nutrints , your exercise lowers your energy level resulting the present smptoms by weakening the immune system . Before starting actual exercises ,warming up work out should be performed . Also include Deep Breathing , Anulom Vilom , Bhramari & meditation also help strengthen your heart and , in fact whole body , but increase gradually . Never over do . . Avoid constipation , sleeplessness ,stress ,tea ,coffee , smoking ,alcohol water intake is very essential . Take lemon juice in a glass of water with a pinch of salt & pepper 3-4 times a day for instant energy . Coconut water has essential nutriens and enlivens the soul instantly . Take Homeopathic Natrum Mur 30 /3 doses / half hourly . will help to alley your symptoms . Regular follow up with your doctor is necessary Hope this helps solve your query . Take care .All the best . Dont hesitate to come back if have further query .