I frankly never put much value in the sleeves, thought they were more a fashion statement and just another item the ball companies throw at us to get folks to spend more money on.
However, a couple of weeks ago I went to practice and for the first time in my bowling life I felt a very sharp pain in my bicep. I continued to bowl with caution, but the pain persisted so I stopped.
On the way home I stopped at Walgreen and bought a Copper Fit elbow sleeve, but bigger so I could cover my bicep. I waited three days then went bowling wearing the sleeve and felt no pain. So was it the three day rest or did the compression sleeve help.
I'll never really know, except I have yet to have a return of pain and I wear the sleeve every time I bowl now.