Prostatitis exercise, which is the best?

When medical treatment is not much helpful for my brother's chronic prostatitis, he began to look for new way to relieve his prostatitis symptoms.

He began to pay high attention to his daily diet and tried his best to stay away from spicy foods, which he likes best and most, and he never stays up anymore although the pain in his lower back area makes him cannot sleep well. And I think he should take more exercises to make himself stronger.

What prostatitis exercise is the best and most effective one?