If you're like most people, you probably have a few go-to workout routines that you always fall back on. And while there's nothing wrong with being creatures of habit, sometimes it's good to mix things up a bit. That's why we've compiled a list of three best-selling fitness books that are sure to change your workout routine for the better. 

From yoga and protein to nutrition and an active lifestyle, these books have something for everyone. So, whether you're a gym rat or a yogi, there's sure to be a book on this list that will help you take your workout routine to the next level. 

1. "Yoga For Beginners" by Tara Stiles 

If you're new to yoga or looking to refresh your practice, this is the book for you. Packed with tips, tricks, and step-by-step instructions, Yoga For Beginners is the perfect guide for those just getting started with yoga. Tara Stiles covers everything from the basics of hatha yoga to more advanced practices like power yoga and ashtanga yoga. She also includes information on proper breathing, meditation, and diet—all of which are important aspects of any good yoga practice. 

2. "The New Rules of Lifting for Women" by Lou Schuler and Cassandra Forsythe 

This book is perfect for women who are serious about lifting weights and getting in shape. In The New Rules of Lifting for Women, authors Lou Schuler and Cassandra Forsythe dispel common myths about lifting weights and show readers how lifting can help them achieve their fitness goals—whether they want to lose weight, build muscle, or just get stronger and healthier overall. The book includes detailed workout programs for beginner, intermediate, and advanced lifters, as well as helpful advice on diet and nutrition. 

3. "The Lean Body Promise" by Bill Phillips 

Bill Phillips' Lean Body Promise is all about helping readers sustainably achieve their fitness goals. In the book, Phillips lays out a specific plan designed to help readers lose fat, build muscle, and improve their overall health—all without crash diets or crazy exercise regimens. He also provides helpful advice on healthy eating habits and lifestyle choices that will help lead to lasting results. If you're looking for a more holistic approach to fitness, this is the book for you. 

No matter what your fitness goals are, there's sure to be a book on this list that can help you achieve them. So whether you're looking to mix things up or get started on your fitness journey, be sure to check out one (or all) of these best-sellers. Your workout routine will thank you!