Side Effects. Side effects are rare; still symptoms like ear irritation, acute inflammation of the ear canal and pinna are reported. In some cases the pet might experience lack of appetite, vomiting, diarrhea, or hearing loss during the course of treatment, which might require immediate medical aid.
Furthermore, if the median age of a marathon participant is about 40, then the average maximum heart rate of a U.S. marathoner is about 180. Seventy percent of 180 is 126, while 80 percent is 144. Therefore, the heart rate of a mid-pack runner during a marathon is near the middle of the range -- between 126 and 144, or 135 beats per minute.
A normal resting heart rate should be between 60 and 100 beats per minute. A rate of more than 90 is, however, considered high. 1  The resting heart rate of well trained endurance athletes can be between 40 and 60 beats per minute. 2  Test your rate over a few days to get an average. One basic method is just subtract your age from 220. 2  So if you are 30, your maximum heart rate will be approximately 190 beats per minute. 3  This method is considered more accurate for those under 40. 4  A slightly more complicated recent method is to multiply your age by 0.7, and then subtract that figure from 208.