Kettlebells are extremely effective training tools, we all know that.So are dumbbells.The key is to know which tool is the right tool for the task, the right tool for what it is you want.
There are clear exercises that should be performed with a kettlebell and not a dumbbell (and vice versa).
There are many ways to build muscle, providing you apply the right scientific principles to your approach.
Here's what we know right now.
Two critically important training variables are intensity and volume.
Actually, they could be the 2 most important training variables to promote muscular hypertrophy.