There is an exercise protocol that is for PCS. The subject needs to find the effort that causes symptoms. This will be a baseline. Then exercise is done to stay 10% or so below that level. Blood pressure, pulse rate, etc can be determined to measure the baseline.

If before, your target heart rate before PCS was 140, you may find that you cannot go over 110 now. Your target for exercise would then be 100 bpm. This heart rate is maintained for a few weeks than the target is slowly increased. The goal is simple. Find your heart rate that triggers symptoms and exercise at a lower rate. The blood flow through your brain will be helpful but you don't want to over do it.

Search this forum for University and Buffalo and exercise and you should find more info. This was discussed early this past year.

It is likely that exercising until you get the endorphin release is problematic.

Also, avoid exercises that create any form of jarring effect on your spine. These will impact your head.

Merry Christmas to all.