VIDEO: 15-Minute Abs Workout Say Goodbye to Boring Crunches! -- By Nicole Nichols, Fitness Instructor For more information about this video, please scroll down to read the text below the video player.  Take this video with you! Click here for a printable version of Coach Nicole'sAbs Workout!    About This Workout  This workout will help you strengthen (and stretch) your abdominals, obliques, lower back, and hips—without any equipment. Coach Nicole will take you through one short set of 10 exercises (plus stretches) for a complete core challenge. Length: 15 minutes Equipment: Body weight, mat (optional, for cushioning) Type of Workout: Strength training (toning) & flexibility Muscles Worked: Core (abs, obliques, hips, lower back) Fitness Level: Beginning to advanced; since this workout has few transitions, it may also be suitable for individuals with limited mobility. Impact: Low-impact Safety Precautions: A mat will help cushion your body while lying on the floor. Since this video will work your muscles to fatigue, rest at least 1-2 days before doing additional abdominal/core exercises. NEW! Track Your Workout: Scroll down to the bottom of this article and click the "Add to Fitness Tracker" button. (You must be logged in for this to work.) Extra Tip: Only complete as many exercises as you can, taking a break as needed. As you progress, try to finish the entire video.