"...In addition, of the 81 different riders who finished in the top-10 of the Tour de France during this period, 65% have been caught doping, admitted to blood doping, or have strong associations to doping and are suspected cheaters. ..."
https://www.businessinsider.com/lance-armstrong-doping-tour-...
"...For a nearly year Serena Williams was allowed 'Therapeutic Use Exemptions' (TUEs) which involved LOTS of steroids. Date for use/Date given/Substance
Oct 2010 - Mar 2011/23 Dec/Hydromorphone
Dec 2010/23 Dec/Oxycodone
Nov 27-Dec 1 2010/23 Dec/Methylprednisolone
12-19 Mar 2014/13th Mar/Prednisone
21-30 Mar 2014/2 Apr/Prednisone
7-21 May 2014/8 May/Prednisone
10-17 Nov 2014/3 Dec/Prednisone, Oxycodone
5-10 June 2015/8 Jun/Prednisolone
https://www.tennis.com/news/articles/tandon-a-closer-look-at...
"...Oral corticosteroids reduce the pain and inflammation that often occurs with extreme exertion. Athletes have reported that corticosteroids help them push through the pain of extreme exertion and allow them to recover faster for the next event..." https://truesport.org/clean-sport/5-facts-about-corticostero...
Painkillers and anti-inflammatories are usually taken to shorten recovery time. It's usually a sign that an athlete can't keep up due to old age/injury or, if many athletes are using them, because the sport has an unrealisticly busy calendar.
"...Anonymous surveys done after elite athletics events in 2011, in which 57% of competitors admitted doping compared to under 4% in WADA test results..." https://www.theguardian.com/sport/2017/aug/29/sport-doping-s...
"...In addition, of the 81 different riders who finished in the top-10 of the Tour de France during this period, 65% have been caught doping, admitted to blood doping, or have strong associations to doping and are suspected cheaters. ..." https://www.businessinsider.com/lance-armstrong-doping-tour-...
"...For a nearly year Serena Williams was allowed 'Therapeutic Use Exemptions' (TUEs) which involved LOTS of steroids. Date for use/Date given/Substance
Oct 2010 - Mar 2011/23 Dec/Hydromorphone Dec 2010/23 Dec/Oxycodone Nov 27-Dec 1 2010/23 Dec/Methylprednisolone 12-19 Mar 2014/13th Mar/Prednisone 21-30 Mar 2014/2 Apr/Prednisone 7-21 May 2014/8 May/Prednisone 10-17 Nov 2014/3 Dec/Prednisone, Oxycodone 5-10 June 2015/8 Jun/Prednisolone https://www.tennis.com/news/articles/tandon-a-closer-look-at...