Final answer:
The assignment involves recording heart rate, applying the principles of training to cardiovascular fitness, identifying the cardiovascular system as the main body part worked in cardio exercises, and calculating run times for increased distances given a base time.
Step-by-step explanation:
The Cardio Fitness assignment for the student has multiple components, which include recording heart rate measurements during various physical activities, and understanding and applying the principles of training to improve cardiovascular fitness. To answer Part II, an example of using the frequency variable could be increasing the number of days you jog by one additional day per week, while for the intensity variable, you could increase your speed when jogging. For the time variable, you might aim to extend your jogging duration by 5 minutes each session.
For Part III, during cardiovascular fitness exercises like running, you primarily exercise the cardiovascular system, specifically the heart and blood vessels, helping to improve the efficiency of your heart.
In Part IV, if Cary can run half a mile in 4 minutes, the time to run 1 mile would hypothetically be 8 minutes, 12 minutes for 1.5 miles, and 16 minutes for 2 miles, assuming a consistent pace throughout the run.