Off-Season Strength and Conditioning for High School Football

Let us suppose, hypothetically, that I am approached by a young man in the football offseason who wishes to improve his performance on the field for the aforementioned sport. He asks for advice on how to train appropriately for this goal. Let us assume this young man is 5’11”, 160 lbs, and between his sophomore and junior seasons in high school. He is of average build, moderately athletically inclined, and-for the sake of the discussion-going to follow my advice. Essentially, this kid could be playing any position on the field depending heavily on skill level and the level of competition. This hypothetical kid represents a blank slate which we can use for the purpose of discussing sports performance training in very general terms.