yeah i have been doing them the past couple days, but wasnt sure if they were the best thing or not, but ill keep at it then if they are really good!Did my first hill sprints session today and did everything that is said to. Only problems are I couldn't do 3 miles after only 2 and, I'm not to sure if my hill is long enough. Is there an app or something out there that will tell you clearly.
Also MozzaLUFC have you heard of gainers, they work wonders. YouTube Sean Lerwill gainers, the video will tell you everything.