FITT principle is not needed to assess current fitness levels.
Hence, the correct answer is: FITT principle.
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Answer: too much sodium intake
Explanation:
Running reduces the risk of blood pressure, obesity etc. During running the body system works together.
Running can help to improve physical and mental health. Running usually use core and lower body parts.
As a person run, it uses both skeletal and muscular system. It also involves respiratory system.
Thus, here it can be concluded that during running body system works together.
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