36 m with no cardiac history or issues. after every rball game, hr drops from 130 to 90 in a minute but in high 80s for few hours. normal? no symptoms

Cardiac monitoring: It is difficult to comment on this without further history or examination. What you have described, sounds normal but if you are concerned , he needs to visit a doctor who can arrange cardiac monitoring to ensure you don't have any form of arrhythmias.

Heart rate: Heart rate variation is normal and healthy in people who don't have heart disease; the resting heart rate is a very rough measure of fitness. In the absence of other concerning symptoms, these numbers are not concerning. These little text boxes are not big enough for a personal consultation, so if you have concerns, consider an Inbox consult here on HealthTap where details can be discussed.