Female gains in body fat starting around puberty can result in a cycle of diminished physical fitness.

It really all depends on the person. If the female has a routine fitness cycle she is adapted to, she could continue it. But if a female is used to not doing any physical activities, the she could easily see a decrease in her fitness life. It could also go the other way around.

Explanation:

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.

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