OFF SEASON:
Your off-season weekly gym program should include two strength training days (superset opposing muscle groups using functional exercises) and a speed/power day (explosive weightlifting movements in a circuit, with plyometrics as intervals), in addition to your athletic skill training/practices on the field.
Do some agility work and sprint starts at the end of your speed/power circuit. Then include 2-to-3 endurance/cardiovascular training sessions each week as well, running for about 30 minutes with short sprint intervals and hill running ... not just long endurance runs.
IN SEASON:
For in season training, just reduce your training volume and cut back to only one strength workout and one speed/power workout per week. You can adjust the number of endurance training sessions as well, depending on the number of practices or games you have each week.
Adjust Your Training Depending Upon Practices Or Games
Adjust Your Training Depending Upon Practices Or Games.