First of all, we need to know that resistance (also known as back drag force or fluid resistance) is the force opposite to the direction of motion generated by the relative motion of an object in a fluid. The human body can grow muscles through resistance (whether it is freehand exercise, resistance bands, dumbbells, mechanical training equipment, etc.) to destroy the composition of the muscles and then recombine them through the intake of protein. Therefore, the resistance band is obviously also a kind of resistance, so training with the resistance band can grow muscles.
Many people will strive to train "muscles of large muscle groups", but ignore the importance of "muscles of small muscle groups".
When we are doing squats, grip presses, deadlifts, and other actions, in addition to the muscles of the large muscle groups playing the main force, there are actually many small muscle groups that play the role of assisting and stabilizing the body. Therefore, the strength of small muscle groups is very important. Strong small muscle groups can help lift the maximum weight of each project upwards, and resistance bands are just a very effective tool for training small muscle groups.