Blisters are a sign of which classification of burn?
a.
first-degree burn
b.
second-degree burn
c.
third-degree burn
d.
none of the above

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.