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 heart rate of 38 beats per minute (bpm) can be normal in a well-trained endurance runner at age 60. The heart rate normally lowers at rest. And distance running over four years could cause a reduction in resting heart rate from 60 bpm to 38 bpm. am a 60-year-old runner and Iâve been running for about four years now. My resting heart rate used to be 60 bpm (beats per minute). Last year in my prime shape after running four marathons in four months, I had a resting heart rate of 38 bpm.