In You question necessary to mark what kind of sport activity (kind of sport) and level of athlethes and that tipe of pharmacologycal providing take place - in another case this question have now any sense
In general, sport activity decrease LDL and increase HDL. In female elite volleyball I have seen this effects after 11 weeks of training. This athletes have 36% fat in their diet and they don´t take medications.
As I see in You observation the athlethes have really big amount of training activity without the medical asiistrant (like medicines having common anabolical effect) - so You have most certantly clear effect of increasing of speed of LDL circulating in blood vessels - it's quite typical effect for young healthy people with high physical activity despite of sex peculiarities.
You can see different opinion and discussion in literature and in ResearschGate too. To my own experience important to talk about the sport kind - I work with the ellite skiers - for this athlethes (real sportsmans) play an important role the increasing of the speed of LDL degradation in blood vessels.