Spiritually Strong: The Ultimate 6-Week Guide to Building Your Body and Soul by Kristen Feola is all about improving your physical and spiritual fitness. In her book, Kristen explains the importance of addressing the condition of your spiritual core muscles along with taking care of your body. She also takes you through a six-week Bible study and workout program to help you apply what you’ve learned. The following 22 exercises are featured in Spiritually Strong.