Running

This depends on the particular ACL injury. Compression works for me as it holds my knee together more than it's capable of on it's own, it might not work for someone else. As EEI says, talking to a physio about specifics injuries is always going to make sense.

Send Michael (bluerip or whatever his handle on here is) a message. I'm pretty sure he's not gong to charge for a general advice regarding compression vs. bracing, as long as you know details of your injury.

And if you ever want, we can poodle together, as my knees, one heel, wrists, shoulders and mid section of my spine are FUBAR as well :-)