Last week I noticed that my bottom bracket was fairly loose, so I thought nothing of it (it's an old Schwinn Le tour that's been converted), and went to the bike shop to get it tightened (I didn't have the tools). Anyway, so the guy tightened it, everything was tip-top until today. I noticed again that there was some play in the BB. Is this something that I should start getting worried about (the fact that is becoming loose, not the fact that it is loose)? I'm assuming those track stands and what not put a lot of pressure on it, but I'm trying to figure out why it would become loose in the first place? Is it in need of replacement (I sure hope not) or is there a problem with the frame, or what? The peeps at the shop tightened it down pretty well and it didn't have any play right after I got it out of there, but I guess it just got loose again.
Any help would be appreciated.