They can't say it, bad for business. Imagine being told the lead singer has a bad back at a show you are going too? It will turn off ticket sales (for any band, not just Bon Jovi) His not a statue, his is not struck to the spot but his not like he used to be. It could be age, it could be what he wants to do now but I think there is something going on. I have heard a few reviews where they said, you could tell he wanted to move around more but held back.