Answer:
Um...
Explanation:
Answer:
1. Is linked to heart disease
Explanation:
We automatically rule out numbers 3 and 4 because smoking tobacco actually INCREASES heart rate and weakens the respiratory system. Also, we are talking about the circulatory system, so we automatically know it has something to do with the heart. There is definitely a link to heart disease and this is a lot more devastating than red blood cells. So I'd go with 1, unless your teacher taught you otherwise.
Which of the following are the four elements of fitness programs?
Answer:
The four core elements of exercise are aerobic exercise, strength training, developing core muscles and interval training. Aerobic exercise is all about getting your heart pumping. As you perform aerobic exercises, like walking, running or using an elliptical, your immune system is activated and your stamina increases.
Explanation: