Hi !
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<em>Hannah wants to improve her cardiorespiratory fitness levels, so she begins to alternate running on a flat track with running up stadium stairs. This principle is known as</em> tedium.
The answer is c, if you do not have a specific machine to achieve your purpose, use something similar and adapt to your needs
Is this a question or a statement? I’m confused
20 seconds, clean tap water
i'm pretty sure this is correct.
