I've mentioned this before, so please forgive my repetition if you've read it before, but...

10 minutes strikes me as at least 8 minutes too long for re-starting an exercise routine. For my very athletic daughter we had to start at 2 minutes a day and work our way up in 30 second increments every 5-7 days. It takes forever. I realize that 2 minutes seems ridiculous. But it works..at least it worked for my daughter. She is up to 20 minutes plus, including being able to run outside.

From my understanding, you should not exercise until you have a symptom. You need to stop before you have a symptom.

This process not only helps your brain/cardio system readjust, but it also changes your mindset set from "shoot...look what I can't do" to "Yay...look what I did today!" It gave my daughter a tiny sense of control in the nightmare of PCS.

All the best-