Ultimate Plank Fitness features step-by-step instructions for 100 different variations of planks to customize your workouts and done your whole body.
Jennifer DeCurtins is a fitness instructor, personal trainer, yoga teacher and creator of the popular blog PeanutButterRunner. She also holds a 200-hour registered yoga teacher certification through Yoga Alliance and teaches hot yoga, power yoga, and vinyasa flow yoga at several studios in Charlotte, NC. Her classes often have 30-40 people in attendance and she was just named "Twitter Personality to Follow" by Charlotte Magazine in their "Best of the Best" awards. She has also served as a Lululemon Ambassador.