88 is pretty high yeah - few factors come in to play like how recently you were standing and moving around, but generally speaking, if your BPM is over 70-75 at rest, you're either really unhealthy or have a very naturally fast heartbeat, which can be a sign of heart issues.
Behold the online doctor syndrome.
I believe resting heart rate between 60 and 100 is the average (or something like that).