We call this the “stroke volume”.Ī regular adult, exercising at their maximum level, can have a stroke volume of 120ml. Increased thickness of the left ventricle wall (the lower chamber of the heart), enables endurance athletes to pump more blood out of their heart each time it beats. This is the side of the heart responsible for circulating oxygenated blood around the body and to the muscles during exercise. Regular training results in an increase in the thickness of the muscle forming the heart wall, in particular, the left side of the heart. Let’s first look at the all-important cardiovascular system, which is adapted to enable a regular supply of oxygenated blood to the working muscles. Years of training have brought about bodily adaptations that enable elite endurance athletes to perform at the top of their game. These athletes can run for more than two hours at speeds an average person could maintain for only a matter of seconds. This year’s lineup includes current champions Eliud Kipchoge and Brigid Kosgei. Athletes will run on a closed-loop circuit around St James’s Park before finishing on The Mall. The 40th anniversary of the London Marathon takes place on Sunday, October 4 2020.
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