I have used winstrol many times before bodybuilding competitions. It killed my joints and made squatting unbearable. If I could barely squat, I couldn't imagine trying to spring 100m.
There are much better options then winstrol to increase speed. In particular, A PPAR agonist like cardarine or SR9009 would be your best option -> https://www.evolutionary.org/cardarine/
There are much better options then winstrol to increase speed. In particular, A PPAR agonist like cardarine or SR9009 would be your best option -> https://www.evolutionary.org/cardarine/