Cause string/cord feeling after 30 mins of exercise in legs bilateral? chest pains sometimes too. dizziness, nausea.vascular? neurology? pulmonology

Primary Care: Start any workup with your primary care physician. My concern is the chest pain. I would start with a good stress test or other screening cardiac workup (EKG, stress echo, and calcium score, maybe), then rule out peripheral vascular problems, then check nerve function. This would be more efficient after a proper exam, though. See your doctor...