Another vote for asking the doctor for a definition!
I was recovering from very minor knee surgery and repeatedly asked my trainer if I could go to Seattle to meet with some folks for a bike ride - he said it was an excellent idea.
I was absolutely crippled the next week - told him I only made about 19 miles before I was suddenly in pain and had to turn around and ride the 19 miles back very slowly.
He said "19 miles!!, what were you thinking". I told him I was thinking no one in their right mind would drive 3 hr to ride to ride only a couple of miles and that I'd asked him if it was OK - we just had a major miss-communication
ask, and be specific.