Respected Sir, Hi I evaluated your query thoroughly. Regarding your first query for artery blockage, it`s not by enlarge possible as there are vivid features and presentations of artery blockage rather than only pain in rt. upper leg. I think its muscular. Second query of dizziness and sick after quarter mile, it`s the time lapse of 1-1.5 years after which you are running or exercising then definately your body tissues require time to get accustomed with the past tone dear. I hope I am clear to give proper justice to your queries. My suggestions : * maintain your hydration level to its best * gradually increase level of your exercise day by day. * have high protein & iron diet. * keep BP and Blood sugar level under control. * quit tobacco / smoking / alcohol consumption of any type if doing. * have adequate sleep of 8 hours. * do YOGA and meditation exercises for 30 min daily in your busy schedules. Thanks for patience reading, regards Bye take care wishing you happy healthy life ahead.