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.
The average runner aged 20-29 finished over a minute later, with a time of 3 hours, 44 minutes and 47 seconds, The Telegraph reports. The overall average finish time for the event was 4 hours 6 minutes and 8 seconds.Read more: 1  London Marathon 2015: middle-aged runners faster than their younger counterparts-Telegraph.OU'LL SHRINK. The average marathon runner will be about 1cm shorter at the end of the race than when they began. This is because over time, the discs in the vertebrae compress, researchers at Swansea University found. However the height decrease is naturally reversed in about one dayâs time.