Write a paragraph explaining the importance of cooling down after a workout

What is an important step to prove something is valid or not? determining the reliability observing research testing

Can someone give me one specific health problem (within unhealthy eating) and explain it. !

Choose a topic from the reconstruction era listed below. research your topic. write a 300 word report on your findings! (one topic) 1 the conditions in the south during reconstruction 2 lincoln’s assassination 3 the freedmen’s bureau 4 the impeachment of president johnson