"Muscles" tense up as a defense mechanism
You cause a injury or put something. You need to stretch your muscles before
Answer:
Cooling down allows your body temperature, blood pressure, and heart rate to return to their normal levels. Stretching your muscles while they're still warm can help to reduce lactic acid buildup, reducing your chance of muscle cramps and stiffness.
Hope this helps :)
Answer:3 cm below the umbilicus
Explanation:day of birth at umbilicus then goes down 1 cm each day