Progressive overload refers to

a. maintaining calorie excess
b. achieving the anaerobic threshold
c. increasing the physical demands on the body over time
d. adjusting the intensity of the workout

The answer is letter C, increasing the physical demands on the body over time.

Explanation:

"Progressive Overload" is a principle that is commonly used by muscle gainers. This principle states that muscles will grow once the body is forced to adapt to a tension. This tension must be more than the tension he previously experienced.

This means that, if you are lifting 30 lbs. every day, nothing will happen to your muscles if you lift the same amount of weight for 10 years (provided that you also do the same repetitions).

In order to gain muscle, you have to increase the weight or increase the number of reps. This will allow your muscles to adapt to the new change and thus your body will also gain strength. It will also look more toned.

Thus, this explains the answer, letter C.

tell their parents and make sure she gets from a counselor or therapist. be supportive and be there for her. be a kind and good friend. spend time with her to make her feel like she's not alone. i'm not a professional but i really hope they stays strong.

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.