If you have been doing the same ab routine—crunches, planks, and bicycles—for years, you are probably ready for a creative challenge. One easy way to wake up your core is by adding dumbbells to your ...

Mr T may have built one of Hollywood's most iconic physiques, but the Rocky III star insists he never got there by lifting heavy. Even now, at 74, his routine consists of light dumbbell work (roughly ...