9D: Describe the characteristics of a good exercise leader.Discuss a popular training method (circuit training, P90X, Zumba, Crossfit, etc.). What are the advantages and disadvantages of the program,

9D: Describe the characteristics of a good exercise leader.Discuss a popular training method (circuit training, P90X, Zumba, Crossfit, etc.). What are the advantages and disadvantages of the program, and are there any precautions needed prior to engaging in the program you choose?