Sounds like your friend realized it. Listening to your body and seeking out professionals if it sends negative signals is probably a better strategy than asking

Sounds like your friend realized it. Listening to your body and seeking out professionals if it sends negative signals is probably a better strategy than asking a doctor before any activity, unless you already know you have serious medical conditions. I was once in a similar situation where after recovering from surgery I found I could only walk short distances before becoming lightheaded and tired. I asked a medical professional for advice. He told me to get over it. I'm lucky I didn't have to pay for this information.