Ask ten different black belts how often you should train, and you'll get ten different answers, but strip away the opinions, and the numbers actually converge on something surprisingly consistent. If you've ever rolled out of a jiu-jitsu class dripping in sweat, muscles screaming, and wondered whether you should be back on the mat tomorrow or resting for a week, you're not alone. It's one of the most common questions new students ask, and the honest answer depends on your goals, your body, and how quickly you want to see change.