hello, I would like to know if anyone has trouble after exercising ? I have been going for a 1 1/2 hr bike rides every week now. After words I feel very tired and keep getting head rushes every time I stand up. I checked my blood pressure and its was reading 107. My normal is about 130. I have to sit around the rest of the day, the next day I feel fine. I am not eating anything before going, so I was thinking that maybe my blood sugar level was to low causing by pressure to be too low.

Anyone have any thoughts ?
Thanks