Functional in getting an ACL as far as I see. I am so tired of this functional, that functional. My dad used to talk to me about the methods wrestlers have trained in the past. Nothing functional. Get your body dressed with the most warm clothes and go for a long run. Hit the weights with the Olympic Lifter team 2-3 times a week. And wrestle 5 times a week. I trained soccer for 8 years or more. Functional - Monday relaxing 10km cross, Tuesday - 1 hour work on steps - jumps, sprints and etc and 30 minutes drills, Wednesday - 1 hour hill sprints and 30 minutes tactical or technique drills Thursday - 1 hour of short sprints and 30 mins to 1 hour technique of tactical drills. Friday - tactical game 11 v 11 and specific tactics are looked to be applied. That is a preseason.
During the season - we drop the sprints to 20 mins-30 mins max and add technique and tactical drills. We drop the step work to 30 mins and play a heavy 90 mins game afterwards.