Answer:
A. contracting muscle fibers.
C. burning calories
Explanation:
Isometric exercises are the exercises which cause the contraction of muscles only but not to change the length and joint of the muscles. It builds and maintain strength of the body and also helps in burning of calories as a result loosing of weight occur. This exercise burns about two to five calories per minute and boost your metabolism which leads to lower weight.
As far as I know sleeping well is one action that can assist in both physical and mental reparations. Without sleep you can’t form or maintain the pathways in your brain that let you learn and create new memories, and it’s harder to concentrate and respond quickly.
That is true
Hope this helps
Swimming where a lifeguard can see is a good example of a "smart" exercise choice in this context.
<h3>What is Exercise?</h3>
This is defined as the form of physical activities such as running, jogging etc which helps to keep the body fit and improve the general well being of individuals.
A smart exercise which involves swimming where a lifeguard an see helps to protect the individual and prevent him/her from the risk of accidents encountered during exercises, Such risks include injuries, drowning and in sever cases death which is why an instructor is usually ideal for individuals thereby making it the most appropriate choice in this scenario.
Read more about Exercise here brainly.com/question/1365564
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