 [ Symptoms ] hi i am 23 is it normal to have heart rate at 55 while doing biking exercise in gym it was my 1st time my trainer really scared me today when she started to take my test while biking for the 1st 3 minutes i my heart rate was around 95 and i had an target of 120 which i did achieve but soon i was getting tired and my heart rate gradually dropped to 55 my trainer said that it is not normal and that she has never seen anything like that  does that mean i might have heart problems soon  i am always very healthy just have not been doing any exercise for 5 years please could you help me [ Disease ] please realize that the internet poses some significant barriers when it comes to making patient specific comments as you know we can not see your knot or examine it let alone take a detailed medical history or do any diagnostic tests if indicated not knowing the true nature of this knot based solely on your vague description your question cannot be answered you would need to physically see a medical provider and have this knot examined