RAB2 said:
Is it possible to cause damage to your heart or any other organ by doing a very long ride? Are there any dangerous health risks associated with this? I am talking rides of over 100 miles or over 6 or 8 hours at a high pace. Could you get irregular heart beats or anything? I have never had any problems but I am thinking about doing a double century or something like that. I can do 100 miles without feeling too beat up afterwards.
First: Aerobic or Cardiovascular work over 6-8 hours is not considered long. Keep in mind that pro riders are on the bike 6-10 hours a day for 9 months of the year. With proper training and workout schedule, including proper stretching program you should be fine. Injuries usually arise during times of over work or improper preparation.
Second: As for the heart. It is very capable of taking the pressure of long rides. Keep in mind that when talking about heart rate, we usually describe it by rate and rhythm. During times of extreme stress the heart can produce an irregular rhythm. Usually an extra beat or multiple beats. This is what a stress test can identify in people with underline cardiac problems. The stress test takes the body to the max heart rate possible the longest time possible.
If you are concerned about this, then the best thing to do is have you doctor run an EKG or stress test. Find a good work out program with a good aerobic base program.
Third: People due ultra rides and 24 hours rides all the time. RAAM (Ride across America) is going on right now. Usual riding is 100-150 miles a day for 2-3 weeks. Good luck