Thanks for your question on Healthcare Magic. I can understand your concern. Normally echo is done in resting condition. This kind of resting echo can be normal despite of having heart disease. So stress echo should be done. In this, patient is force to perform exertion like running and then echo is done. If you this is normal then no need to worry for heart diseases. Sometimes simple musculoskeletal pain is the cause. So apply warm water pad on affected areas. Avoid strenuous exercise for few days. Don t worry, he will be alright but first get done stress echo. Hope I have solved your query. I will be happy to help you further. Wishing good health to your son. Thanks.