Abdominal wall injuries: rectus abdominis strains, oblique strains, rectus sheath hematoma. Johnson R. Curr Sports Med Rep. 2006 Apr;5(2):99-103.
Abdominal muscle strain. Mount Sinai Hospital. http://www.mountsinai.org/patient-care/health-library/diseases-and-conditions/abdominal-muscle-strain. Accessed July 2016.
Dealing with sports injuries. American Academy of Family Physicians. http://familydoctor.org/familydoctor/en/teens/food-fitness/dealing-with-sports-injuries.html. Updated August 2010. Accessed July 2016.
Overuse Injuries in children. American Academy of Orthopedic Surgeons. http://orthoinfo.aaos.org/topic.cfm?topic=A00613. Updated December 2012. Accessed August 2014.