Answer:
number 1
Explanation:
because you need a schedule so you can know what workout to do and when to do
Principle of Reversibility is the decline of skill and fitness level due to taking a break from exercise or being inactive.
It is called such because all the result of hardwork and labor done to achieve and maintain one's skill and fitness level will be reversed because said fitness regime is not maintained; making the body lax, eventually declining in skill performance and fitness level.
When you sweat , you get hot , and that means that your body heat increases. And when you're cold , your body heat decreases and makes you shiver ..
Hope this helped :)