Well I've decided to start this thread because even though this topic has been touched here and there, there never really has been a proper discussion about it. We all know Anavar reduces sprint times, but what other AAS out there also do? Some people I know of has said Winstrol, and indeed it does, but it also causes tightening several days into it. However i have noted a strange improvement in times 2 weeks after people clear winstrol. How about substances like testosterone? More for recovering from training rather than running fast? Do stimulants hold a crucial key pre-competition? Speak up guys and let us all enhance our knowledge =)