okay. Im looking for some good methods to make my endurance really good. Any tips?
What are you trying to endure?
Wrestling matches and boxing matches
Well for boxing I would use jump rope and heavy bag hitting/kicking. For wrestling I would use a sandbag and a bunch of bodyweight drills with special emphasis on ground work. Theses are two different styles that require different techniques for training endurance.
I could have just as easily answered jogging for hours and hours but that isn’t necessarily going to have any transfer to those sports other than maybe providing a base level of aerobic conditioning.
Build your work capacity slowly. Start by building a base level of power and then building on that by adding how long you can use that power. Think in terms of how long rounds go for a starting point for duration and build up to it: for example, 3x3 to 5x5 minute rounds.
I can’t give you much for boxing, but I have some limited BJJ experience. I don’t think running has much transfer, but as the previous post says, sandbag work and body-weight stuff. Sandbag cleans chased down by shuttle sprints skyrocket your heart rate and get you used to manipulating an uneven load while you’re breathing heavily. Sandbag get-ups have a great transfer to trying to get someone off you if you’re on your back, and you can muscle through them with less precise form and greater speed than turkish get-ups.