These dumbbell / kettlebell exercises will really challenge your cardio exertion and your strength in each circuit, targeting both the upper and lower body.
Video features 8-15lb. dumbbells, but choose a weight appropriate for your condition. Form is most important!
If you need to drop the bells by your side you can, but try to make progress with each workout.
Pay attention to Andy's stretching movements, especially when he demonstrates the kettlebell (or dumbbell) form of hip-hinge motion. That will ensure you're properly using the kettlebells (or dumbbells) once the challenges begin.
As you get stronger, you can try heavier weights to keep the workout challenging.
During the "complex" movements where you don't put the kettlebells down, it is more important to perfect your form before speed.
This is not just a strength training workout, you're definitely going to sweat thanks to Andy's quick pace.