Kevin burns 5.5 cal/min by walking at a speed of 4.5 miles per hour. He is also able to have a conversation while performing this moderately intense physical activity. What effect does this activity have on his breathing and heart rate:

A. a slight change in his breathing but no change in his heart rate
B. no change in his breathing but a significant change in his heart rate
C. a significant change in both his breathing and heart rate
D. a slight increase in both his breathing and heart rate e. little to no change in his breathing and heart rate

A. hannah wants to improve her cardiorespiratory fitness levels, so she begins to alternate running on a flat track with running up stadium stairs. this principle is known as a type b tedium c time d frequency 2. charlie is easily winded during soccer practice and wants to improve his cardiorespiratory fitness. which activity would be best for him to choose? a lifting weights b walking from one class to another c running in a 5k race d riding a bike at a leisurely pace 3. felicia just began running this past month, but since she continues to run the exact same route and exact same distance every day, she is growing bored with her runs. this principle is known as a tedium b progression c specificity d reversibility