Runners World: The Trick to Hamstring Rehab, http://www.runnersworld.com/injury-treatment/trick-hamstring-rehab
New York Daily News: Running Docs Advice on the Best Way to Avoid or Rehab Hamstring Injuries, http://www.nydailynews.com/sports/more-sports/running-doc-avoid-hamstring-injuries-article-1.1327216
Runners World: BodyWorks: Hamstring Injuries, http://www.runnersworld.co.uk/beating-injury/bodyworks-hamstring-injuries/212.html
TeensHealth: Hamstring Strain, http://kidshealth.org/teen/diseases_conditions/bones/hamstring_strain.html
Jeff Galloway: Injury Archive: Hamstring Pain, http://www.jeffgalloway.com/training/injury_archives/hamstring.html