Hello. Welcome to HCM and thank you for your question. I understand your concern.
Pain in the chest can have different origins, which include also the locomotion system, i.e. muscles, joints and ribs. Now, every time we work out, even if we do not include the between rib (intercostal) muscles, suffices that we have heavy breathing and this can cause
intercostal muscle soreness, which is mostly reflected as pain. If you try to
cough, and you get the pain, then it is probably this diagnosis. As all other episodes with muscle soreness, no special treatment is required, as it goes away in few days. According to your age, my opinion is that cardiac and pulmonary origin of this pain is less likely. However, just to be secure and "in the safe", I would recommend you to do an EKG, as there sometimes are inflammations of cardiac lining (
pericardium) which do not have an age predilection and can happen in all ages, especially after an episode with
flu or other forms of infection. Just to be clear, my suspicion that this is the case is very low, but I recommended the EKG to securely exclude this as an origin of your pain. As about the waves of
dizziness, I would be more comfortable answering this question if I had more details, because dizziness is a symptoms that may have various origins. It probably is, in this case, from over loading of physical activity and, in this case, no further examination is required. I would recommend you to take two to three days off from working out, and see if these bouts of dizziness happen again.
I hope this helps. Take care.
Best regards,
Dr. Meriton