Kettlebells for BJJ?
You bet! Whether you're a hard-core competitor or a hardcore hobbiest, it's important - both for your health and for your jiu-jitsu goals - to cross-train. Cross-training helps work muscles that you don't normally work on the mat, strengthen muscles that you do, correct imbalances, and generally just keeps your body in better shape.
But maybe you can't afford or just don't like the idea of having another gym membership. Enter kettlebells: kettlebell movements are incredibly beneficial for supplementing your jiu-jitsu; acquiring the necessary weights is relatively cost-friendly; and you can do a kettlebell workout anywhere.