The kettlebell is beginning to get the credit it deserves, and for good reason. Its top-mounted handle makes it the ideal tool for ballistic, swinging movements, giving workout options that are tough to replicate with dumbbells or a bar. Because moves like the swing, snatch and clean use virtually every muscle, they can be done for low reps to build full-body explosiveness, or ultra-high reps (50 in a set isn’t uncommon) for fat burn and cardio.