Originally Posted by
November Dave
aka "the freebie."
Happens to me all the time. My GP linked it to low blood pressure, said it's basically part and parcel of being healthy. I'm exactly twice your age, so it's not exclusive to any age group.
+1 to this. I started cycling about 3 years ago (I'm 45) and this happens to me a lot more frequently than it used to and even a bit more extreme. My doctor said it's due to lower blood pressure and mine was never high but seems to be lower since I started cycling.