Exercise stimulus is a pro-inflammatory process.
If you do a quick search in scientific litterature you will notice. The best way to reduce inflammation was thought to be cold exposure, but has been widely debunked in recent decades.
The best way to reduce inflammation is probably recovery, and with this I mean every kind of low intensity active recovery type of activity.
This will actually increase blood flow in the district area and reduce inflammation.
If you are referring to whole body inflammatory process, oriental meditative disciplines are claimed to be useful in this sense: but no real proof at all of this.