About Us

Kate Kobrow and Amy Perkins partnered up to create a dynamic after school experience like no other. Run by industry leaders in both fitness and education, we are committed to offering a program full of encouragement, motivation, high fives and inspiration.


Kate Kobrow

Kate is the owner of The Group Effect fitness studio in Roseville, California. She is a Reebok sponsored athlete who trains and presents nationwide as a LesMills BODYATTACK instructor. With a degree in Kinesiology and over 14 years as a lead instructor, every single class she teaches is a motivational work of art. She’s also a 200 RYT Yoga Instructor with Yoga Alliance as well as an ACE group fitness instructor. Her number one job is being a mother to her three gorgeous daughters and handsome baby boy.

Amy Perkins

Amy is a credentialed teacher with over 23 years experience teaching students and coaching educators. She holds a master’s degree in Curriculum Design and spends time in various districts as an educational consultant. For over 16 years, she’s coached hundreds of teachers in Placer County. Amy is a lifelong lover of all things fitness and loves inspiring and motivating others. She's a wife to her husband of 17 years, and mom to two beautiful kids.