Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. His trainers could be right. When our body is in the influence of exercise, it is natural that the blood pressure reads on the upper side. You are concerned about your son s BP. At the same time, is your son worried? If so, that could be another case of anxiety induced hypertension. In both these cases, there is nothing to worry. Taking enough rest should clear the problem. Diagnosis of hypertension is made usually with every 2 hours readings over a period of at least three days. If you require more of my help in this aspect, Please post a direct question to me in this website. Make sure that you include every minute details possible. I shall prescribe the needed psychotherapy techniques which should help you cure your condition further. Hope this answers your query. Available for further clarifications. Good luck.