Describe the principle of overload and explain how frequency intensity time and type can you safely apply overload to your favorite activity

The principle of overload states that the body adapts to every stimulus. Every stimulus needs adaption and in order for a muscle (including the heart) to increase strength,a greater than normal stress or load on the body is required for training adaptation to take place - a different stimulus is required.

Different stimulus can be doing the same workout but in smaller time frame (next stimulus can be to run 5km for 25 minutes, if you have run last time for 30 minutes), or every routine can be done more times...Also changing the workout type is way of changing the stimulus (you can incorporate in you workout routine different sports: running, swimming, hiking..for example).

the aorta is the large artery leaving the heart branches into smaller arteries, which eventually branch into capillaries.the arteries carry oxygen and nutrients away from your heart, to your body's tissues. the capillaries are small, thin blood vessels that connect the arteries and the veins. the statement that arteries carry oxygen-rich blood to capillaries is true. veins on the other hand are blood vessels that take oxygen-poor blood back to the heart.

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.