Did any of you get "shots" in your elbows and knees as a kid ?

I remember always going to a small building that was a doctors office, almost every week or so id get "shots" in my elbows and knees, i was born 2 months pre mature, was black and blue when i was born (strangled from the cord) and had to stay in a big box thing for months before i could be brought home. So that made me sick all the time and i thought thats why i went there. But a active heathly child getting "shots" in both knees and elbows every week seems a tad odd.