This is an example of intensity change because he is deciding in one moment to add stretching his arms over his head to each set and it is referring to extreme strength, force, and energy.
He is adding more because he wants to make the transformation and strengthen his muscles. The person who is doing exercises can measure his intensity with heart rate and age.
This can be exlpained by the following: <span>When economic times are good, certain parts of the housing market usually see healthy growth. So the options that can be here is that a strong economy lowers housing costs and of course a weak economy raises housing costs. </span>
