Hello dear user! Welcome to HCM! Headache and dizziness may be found in extreme physical activity due to increase of blood pressure. But it s not very usual in light activity. I would like to know your age also to build up an idea about the reasons leading to those symptoms. Anyway in your case I think some simple examinations would be worth to check your general heath status. - Blood pressure monitoring - Heart ECG - Blood sugars and fats - Carotid arteries ultrasound If anything suspicious is found in these examinations we would like to know, so we can recommend you further steps to be followed and what doctor you should consult. Meanwhile you keep having a balanced healthy diet and well hydrated. All the best for you! Kind regards! DR ERIOL.