Haematological and biochemical observations during a 750 mile relay

During a marathon relay from John O'Groats to Lands End (JOGLE) various blood and urine parameters were measured in the runners. Samples of blood and urine were taken from each runner immediately prior to the event and on two occasions during it. Subsequently a three point plot was made for each parameter measured. No special diet was taken. Food and liquid refreshment was provided during the run, the first two days of which came from the organisers. The total distance covered was 870 miles and the time taken one hundred hours and thirty-two minutes. Although the results do not approach statistical significance a trend has been shown suggesting that even with the modern running shoe injury may still occur.