How far along are you? I am not sure, but depending on how far along you are, do you think it will be comfortable. The ball isn't being thrown at you and it isn't normal to fall while bowling, I don't see the issue with it. I guess to make sure you stretch so you don't pull a muscle.
I play catch and frisbee with my husband and I lift weights and jog still. Unfortunatly I cannot ski this winter............we even built our new home 3 lots down from the ski lodge in Iowa and I will be so close and not able to go.