More than eight in ten participants were found to have a serious kidney injury at the end of a race. Researcher’s analysis blood and urine samples of 22 runners before and after a 26.2mile run. It revealed that 82 per cent had high levels of chemicals indicative of Stage 1 Acute Kidney Injury. That is a condition in which the kidneys fail to filter waste from the blood. It can upset the ability of other organs to work accurately. Experts say the sustained rise in core body temperature or dehydration may be to blame.
The Blood start pumping 3.25 miles (5.2km):
At 3.25 miles, the heart rate is raised to around 140 beats per min and the body temperature is rises from 37 degree to 40 degree, you begin to sweat.
Getting in the zone at 6.5 miles (10.4km):
At 6.5 miles, the heart rate steadies to 135 per min. The body is using glycogen from the liver so you start feel thirsty.
The Fat Burn at 13 miles (20.9km):
At 13 miles, the stores of glycogen are getting low. The body begin to burn fat at this stage and thirst continues.
The wall at 20 miles (32.1km):
At 20 miles the glycogen supplies have run out and muscles now breaks down fat to fuel themselves. Blood sugar level is low making feels faint and joints become sore from the impact of running on the roads.
Exhaustion at 22 miles (35.4km):
At 22 miles, the heart is at extreme stress, This is the point in a marathons when most heart attack occurs and dehydration is high.
Homeward Bound at 26.2 miles (42.2km):
At 26.2 miles the joints maybe sore and may feel mentally and physically exhausted but the finish is in sight. One final push before glory is all yours.