7. every fitness program should include

a. a longer warm-up period than cool-down period.
b. at least 60 minutes of cardio activity.
c. at least 15 minutes of vigorous activity.
d. a warm-up, a primary conditioning period, and a cool-down

I'd personally say B because a warmup will reduce injury, soreness, and get you ready. Then you have your exercise. Then the cooldown helps bring the heartrate down to near-normal and to get the blood circulating freely back to the heart. Stopping abruptly could result in fainting or place undue stress on the heart.

7. Every fitness program should include :
D. a warm-up, a primary conditioning period, and a cool-down

Ithink it is the last one sorry if i’m wrong

Your answer is  d.)relationship between pressure and air volume and led to the understanding of how respiration works