What Position do you play?
I coach at the High School level and I am going to post a work-out plan/idea
from a 2 time consensus All-AMerican, Lombardi Award Finalist, and NFL Lineman. 2 Super Bowl rings by the way. He's a friend o mine. Take what ya want and leave the rest

I have attached my resume should an opportunity arise where they need some credentials. I have trained for years in and out of football, and had a L4/L5 Spinal Fusion with Lamenectomy. I have mastered the science of training the correct way to prevent injury during the training and during battle in football, with what is called Neutral Spine stabilization technique during all exertion.
Here it is; maybe you can get me on as the strength and frickin conditioning coach: $25 bucks is my fee, and that is cheap. I'll send you an invoice. Thank you.
First Two weeks: 1 440, 2 220's and 5 100's-I need to find the time constraints, but I know the rest periods-rest 3 minutes after the 440, 90 seconds between the 220's, 3 minutes after the 220's and 60 seconds between the 100's.
Next Two Weeks: 3 220's with 90 seconds in between, then rest 3 minutes before 8 100's with 60 second rest in between each one.
Next Two Weeks: 8 100's with 60 seconds between each one, rest 3 minutes, then do 10 50's with 45 seconds between each one
Next Two Weeks: 8 50's with 45 seconds between each one, rest 3 minutes, then 10 40's with 30 seconds between each one
Next Two Weeks: 10 40's with 30 seconds between each one, 12 15 yard get-offs out of stance with 20 seconds between each one staying low and exploding
Next Two Weeks: 10 15 yard get-offs with 20 seconds between each, 12 lateral movement get-offs out of stance, staying low and directing to the football which coach points either up field, left or right. Defensive lineman must be able two control a gap and also run laterally down the line of scrimmage.
These drills, called interval training with football in mind, encompasses endurance, stamina, conditioning, and technique in the final stages, and should be done twice a week. Normal cardio if these kids have stationary bikes, mountain bikes or unicycles (just kidding) should be done without distance running because it can be done on a bike without putting pressure on the knees and spine. They will get enough abuse to the body running on the track in the initial stages of the interval training.
Note: Weight lifting should be 4-6 days a week with Body Parts Chest and Tri's, Shoulders and Legs, Back and Bicep, and should be done in a neutral spine position at all times. Forget the frickin cleans, dead lifts and squats. As long as they are doing from 12 at the start to 5 for power towards the end on each exercise and do 3 or 4 exercises for each body part, they will get strong. If they only go 4 days a week, combine shoulders with Chest and Tri's and Legs with back and Biceps. If they are doing that long of a workout they should be drinking Carbo-Plex during this workout and definitely a good Protein Drink along with food afterward. The Most important exercises for the Defensive Down-Lineman are Leg Press, Bench Press with pauses after stretching well, and Close Grip, and of course abs-oblique development which should all be done Neutral-Spine. Use nothing that hyper-extends or hyper-flexes the spine; keep the gluts (ass cheeks tight at all times while in an exercise and eventually the abs and spine will become totally neutral without even thinking about it. Always flatten the spine after tightening the gluts at the start of an exercise.
Deads, Squats and Cleans are fine if done PROPERLY. Still a great deal of pressure on the spine.
Good Luck.......
