Have you ever worked out with kettlebells? Used by the Russian military and elite athletes, this style of workout uses various sized kettlebells (essentially a cannon ball with a handle) to perform basic resistance moves such as squats or the clean and press. Kettlebell training is great for working the whole body and is a great strength and cardio workout combined. If you're bored of your current weights workout, training with kettlebells is a great way to mix things up.