https://www.runnersworld.com/health-injuries/a20798485/6-weird-things-that-happen-to-your-body-while-running/
https://marathonhandbook.com/average-marathon-time/
https://blog.mapmyrun.com/7-strange-side-effects-of-running-a-lot/
https://www.runnersworld.com/uk/training/marathon/a776113/what-happens-to-your-body-when-you-run-a-marathon/
https://www.runnersworld.com/uk/training/marathon/a776113/what-happens-to-your-body-when-you-run-a-marathon/
https://www.runnersworld.com/uk/health/a775213/what-happens-to-your-body-when-you-start-running/
https://www.runnersworld.com/uk/health/a775213/what-happens-to-your-body-when-you-start-running/
https://www.active.com/running/articles/7-weird-things-that-happen-when-you-run-a-lot/slide-4
https://www.runnersworld.com/uk/health/a775213/what-happens-to-your-body-when-you-start-running/
https://www.runnersworld.com/uk/training/marathon/a776113/what-happens-to-your-body-when-you-run-a-marathon/
Read More: https://www.healthdigest.com/457137/when-you-run-a-marathon-this-is-what-happens-to-your-body/?utm_campaign=clip
https://www.runnersworld.com/uk/health/a775213/what-happens-to-your-body-when-you-start-running/
https://blog.mapmyrun.com/7-strange-side-effects-of-running-a-lot/
https://www.runnersworld.com/health-injuries/a20798485/6-weird-things-that-happen-to-your-body-while-running/
https://www.sportsmedtoday.com/exerciseinduced-hematuria-va-116.htm#:~:text=%E2%80%9CExercise%2Dinduced%20hematuria%E2%80%9D%20is,%E2%80%9D%20and%20%E2%80%9Cstress%20hematuria.%E2%80%9D
https://healthloco.com/blog/2019/02/25/body-run-marathon/
https://www.huffpost.com/archive/ca/entry/running-effects_n_2206584
https://www.huffpost.com/archive/ca/entry/running-effects_n_2206584
"https://www.healthdigest.com/457137/when-you-run-a-marathon-this-is-what-happens-to-your-body/?utm_campaign=clip
https://en.wikipedia.org/wiki/Runner%27s_diarrhea"