Answer:
The efficiency of the cardiovascular system
Explanation:
Cardiovascular endurance is how efficiently your heart, blood vessels, and lungs to supply oxygen rich blood to working muscles during physical activity (aerobic activity like walking, running, cycling or playing a sport) for a prolonged period of time or for more than 90 seconds.
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I believe that it is a major life change.
<span>When you start a fitness program you are more motivated, you want to achieve your goals.Sometime achieving your goals may take time and this may affect your motivation, as you don't see the results as fast as you want. you lose your motivation and become more exhausted that's why it's easier to start fitness program than to maintain it. </span>
