Hi Youngy, do you use any tempo running workouts in your system, or do you find the circuits and speedball are good enough alternatives for that sort of work?
The reason I ask, is that I only have time to get to the track twice per week due to family/work commitments, but have a garage in which I work out. I have previously used a shortened, modified version of the system (no speedball, and only pressups, chinnies, alternate squat thrusts and squat jumps) which I got from this book: