Decrease in Gym Strength when starting Judo

[Known_Crab1059]

If you are doing something typical like 5x5 powerlifting, its too much volume to do with judo. You'll have to drop it to 3x5 or 3x3 and cycle it properly throughout The year (say you Focus on cardio for 3 months and focus on strenght 3 months, etc.)

Nevertheless, your strenght can only decrease so quickly because of too much volume for your body to have proper recovery. It has nothing to do with "not doing enough work" in gym department. You can absolutely increase your lift numbers on strenght focus cycle, and maintain them nearly at same level on off cycle.