Hemorrhoids Exercise

Exercise with hemorrhoids?
Can pushups, abdominal crunches, leg lifts, or any other abdominal exercise has what kind of effect on my hemorrhoids? I'm just body weight exercises and not lift any weight at all. Do they have any effect on my hemorrhoids?
Walking is good, but something like weight lifting should be avoided. Due to the tension. I found a site that has been very informative about what you do and what to avoid to the extent that erupted. It also has some very interesting home treatments I have never heard about before .. If you are interested the site is Good luck http://www.cureforpiles.com
How to Exercise with Hemorrhoids