If A man has slow mobility was does it mean?

Question

does it mean he is genetically defective biologically?

Or is he mentally challenged?

Answer 1

could mean his sperm are lazy

Answer 2

Slow mobility just means he has a physical limitation on his movements. He may have arthritis or a joint disease or simply old age. There are a LOT of things that can limit mobility.  

Answer 3

I would think it would mean he is mobile (he can move) but is slow.

Answer 4

Maybe he's lazy or isnt trying to move fast.