Jill Thistle is the author of Mommy Muscles: A Practical Guide to Building your Physical and Mental Muscles. This book is for every woman who wants to improve herself and change her life forever. Jill is a group exercise instructor certified by the Aerobics and Fitness Association of America (AFAA). She holds certifications for Dance it Out (DIOÂŽ) Pop Pilates and Personal Nutrition. She is an avid weight lifter and loves teaching many different types of fitness classes. She has an English Education degree and has worked in a special education high school for over 17 years while managing an English as a Second Language tutoring business.