I haven't ridden a bike in about 20 years, since I was 11 or 12. I recently decided to try a 45-min. Express Cycling class at my local YMCA.
The instructor helped adjust the seat to about handlebar height, and I sat and peddled for about 10 or 15 min. until she instructed everyone to rise from their seats and apply resistance to the bike. When I rose, I felt a numbness in my groin that was immediately accompanied by strong pulsations of blood rushing back to it. This lasted for maybe 8 or 10 seconds at most before the numbness disappeared. When we subsequently stood and sit, stood and sit, ad infinitum, until the end of the class, I did not experience this phenomenon at all. However, I was generally uncomfortable in the seat during the class, and for about a day afterwards my perineum area was slightly red and a tad sore. I am a bit overweight at about 206 lbs. and was wearing regular exercise shorts.
After doing several hours of Googling and reading about potential ED, impotence, permanent nerve damage, etc. from bike riding, I became very concerned and decided that I will not be going back to the class again, nor very possibly riding a bike again, save for a recumbent. I am also a bit put off by the instructor because after the class she had told me that this numbness was "normal" and I'll "get used to it." When I asked her about any permanent sexual dysfunction from the numbness, she paused and said jokingly, "well, you'll have to come back and let us know."
I had some almost unnoticeable tingling for brief instances in my groin that occurred intermittently during the 24-hour period after the class. And also I felt that my penis was very slightly less sensitive than I'm used to, but I was still able to get and sustain an adequate erection and perform normal sexual function within hours of finishing the class. It has been less than 48 hours since the class, but I expect that my body may need a few more days to completely "recover." If a week has gone by and I still feel less sensitive, I will be concerned.
I realize this is largely a forum of biking enthusiasts, so maybe this is the wrong place to ask this question. But what I'd really like to know is, based on the brief period of time my groin went numb, should I be concerned enough about any potential long-term issues (i.e. permanent nerve damage) that I should consult a doctor?
Thanks in advance,
Bikerj (who is not a biker)