Exercising causing diverticulitis?

I was diagnosed with diver about 4 years ago but have probably had it much longer now I know what it is. Recently I have read some interesting forum posts suggesting that certain types of exercise appears to be causing flare ups. Strangely, I have been a lifelong exerciser but in phases and most recently, every time I am in an exercise phase it seems I have had an attack within a few weeks. I know this sounds crazy but it really fits in with the pattern. When I am not exercising I am completely well. I am interested to know if anyone else can relate to this? Thanks.