The phrase "to increase the weight" means to add more weight or resistance during a workout in order to make it harder and challenge the muscles even more. This can be done by using heavier dumbbells, increasing the number of repetitions, or adding extra resistance through equipment such as resistance bands or machines that provide counter-force. The goal is usually to push the body beyond its comfort zone so that it can continue to grow and adapt, resulting in improved strength, endurance, and overall fitness.