linebacker speed would be short distance. Anavar and tren could help speed and performance at that potition. I ran low dose dbol with winny and my 5k speed went up like crazy . I mean crazy. I was so amazed. Absolutly GREAT for my middle distance running. Better workout recovery , better times , I could train more , By burst where faster and could be maintained longer. Less catabolism in muscle and more endurence. . I think the key was low dosage(15mgs dbol , 10 mgs winny). .....................I went from about 23:30 minutes down to just over 20:00. Now natty(for a while) about22:00 .. I am 37 and have only been running for about a year. I always wear a 12 lb weight vest when I train and time myself. Perhaps if I was an elite runner hormones wouldnt be making as big of an impact but I felt the difference