Yeah, as others have said, this isn't a great idea. Maybe compounding with other methods.
But it is very painful, not certain at all, and has a decent chance for you to wake up in a hospital with bran damage and inability to CTB in more certain ways (or at least for a while).
The strenuous activity part is going to vary a ton person to person. It is just a very variable and unreliable way to CTB so I wouldn't recommend, even if you can deal with the pain and discomfort.