agreed! conditioning is huge, especially since at the white belt level, you'll be competing in 5-6 matches assuming you win your weight division. however, competing is quite different from rolling. imagine rolling hard, and then doing that again and again. often times, if you're too jittery, you'll end up wasting a lot of your energy before you get to the ground, so just try and relax (although as a wrestler you probably already have some personal technique for keeping calm). your 1 year of judo will definitely help your stand up game, especially against other white belts, and your wrestling gives you a decent enough advantage on the ground and will only help you. in terms of conditioning, here are a couple things you can do try rolling 7-8 5 minute rounds with a minute break in between for water. also, because white belt matches are almost always 5 mins, try rolling for 7-8 minutes -- you'll find your endurance increasing. another thing you can do is going against multiple opponents, but each time you tap somebody out, have someone fresh come in until you use up the full time in the round. start from standing each time. other than that, i'm sure whatever you used to do for wrestling conditioning should do.