Sinković & Towler https://doi.org/10.1177/1049732318819834

Vincent et al. https://pmc.ncbi.nlm.nih.gov/articles/PMC10666711/

EAU https://uroweb.org/guidelines/sexual-and-reproductive-health/chapter/male-hypogonadism

NICE https://www.nice.org.uk/guidance/ng23

WHO https://www.who.int/news-room/fact-sheets/detail/physical-activity