Endorphins released in the bloodstream during exercise.

a. can reduce stress

b. can make you feel sluggish and tired

c. released by the pituitary gland

d. both 1 and 3

The answer would be a (carbohydrates)

The question may be incomplete (there are not the possible answers), but according to the scenario, kaley and her coworkers could be in a humanitarian organization like red cross (in the us or in other countries). it's an organization which organizes health and safety services, disaster services, and blood donations.

Subtract your 2-minute heart rate from the heart rate you took immediately after exercising. the faster your heart rate recovers (or slows down ) the fitter and healthier your heart. if the difference between the two numbers is: less than 22: your biological age is slightly older than your calendar age