Please compare and contrast two different styles of periodization (we suggest linear and undulating).  Please discuss their strengths and weakness, when and how you would use them, what populations you would use them with, and your overall impressions.  Please include two academic sources outside the textbook within your response.

sources:
Lorenz, D., & Morrison, S. (2015). Current concepts in periodization for strength and conditioning for the sports physical therapist. International Journal Of Sports Physical Therapy, 10(6), 734-747
ACSM Foundations Chapter 17.