@thepowerwithin / thepowerwithin.tumblr.com
Quick fact. Ready? When one becomes more aerobically fit, such as with prolonged endurance activities, one's body becomes more efficient at burning fat, as supposed to carbs, over a wider range of intensity outputs. This helps to preserve muscle glycogen, and thus helps to combat fatigue.
Quick fact. Ready? During physical activity, there is a whole bad vasoconstriction, EXCEPT for at the working muscle itself. This dilation at the active muscles is caused by the metabolites released during contraction, and helps to redirect blood flow towards them.
Quick fact. Ready? Endurance training for a minimum of 5-6 hours every week can result in a physical enlargement of the heart itself known as Athlete's Heart Syndrome. The increase in size allows for the heart to pump out more blood with every beat, making it more efficient. This is the body's way of adapting to the increased oxygen demand being put on it during prolonged aerobic training. Now, who wouldn't want a bigger heart?
