Rectus Abdominis Exercises
Essentials of Abdominal Training For Sport Part 1: Antiextension
Best Core-Strengthening Exercises
7 Abs Exercises to Tighten Stomach Muscles for a Strong Core
JFMK, Free Full-Text
Sports, Free Full-Text
Abdominal Muscles Functionality in Fitness Program
13 Stability Ball Exercises for a Full-Body Workout, Livestrong.com
28 Lower Abs Exercises That Will Set Your Core on Fire
Abdominal Muscle Strain - Stomach pain & cramps
11 Best Rectus Abdominis Exercises & Stretches - SET FOR SET