"In short, yes," Omar Mansour, coach for audio-led fitness app WithU tells explains. "In order to build/gain muscle with just dumbbells, you need to be increasing the weight over time. This process is known as progressive overload.
"Over time, you will notice that the same workouts become easier. I'd suggest every four-six weeks to switch up your program and create a new stimulus for your body to respond to and to expose your muscles to different rep ranges.
"Overall, dumbbells can help you gain muscle mass, and even correct muscle imbalances and help you gain strength."
And it's not just in your biceps or triceps where dumbbells can help you add muscle. Thanks to the best dumbbell ab exercises, you can also build a stronger core by adding extra resistance to exercises like crunches, cycles, and even planks. But first, if you're wondering what dumbbell weights should I use, be sure to follow our handy guide.