Sir Magazine has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. We avoid using tertiary references.

• BaconC, et al. (2003). Sexual function in men older than 50 years of age. DOI:
  https://annals.org/article.aspx?articleid=716599

• BegotI, et al. (2015). A home-based walking program improves erectile dysfunction inmen with an acute myocardial infarction [Abstract]. DOI:
  http://www.ajconline.org/article/S0002-9149(14)02270-X/abstract

• DoreyG, et al. (2005). Pelvic floor exercises for erectile dysfunction. DOI:
  http://onlinelibrary.wiley.com/doi/10.1111/j.1464-410X.2005.05690.x/pdf

• Kegelexercises for men. (n.d.).
  http://urology.ucla.edu/body.cfm?id=524

• LaminaS, et al. (2011). Effects of aerobic exercise in the management of erectiledysfunction: A meta analysis study on randomized controlled trials.
  http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3275865

• MayoClinic Staff. (2015). Erectile dysfunction: A sign of heart disease?
  https://www.mayoclinic.org/diseases-conditions/erectile-dysfunction/in-depth/erectile-dysfunction/art-20045141

• MayoClinic Staff. (2017). Erectile dysfunction.
  https://www.mayoclinic.org/diseases-conditions/erectile-dysfunction/symptoms-causes/syc-20355776

• SiegelA. (n.d.). Pelvic floor muscle training in males: Practical applications[Abstract].
  http://newdev.privategym.com/docs/siegel%20pfmt%20review.pdf