It is possible to gain muscle with light weights, but it may be more challenging compared to using heavier weights that are more taxing on the muscles. When using light weights, it is important to focus on high repetitions and proper form to effectively target and fatigue the muscles. Additionally, incorporating other resistance training techniques like drop sets, supersets, and slow eccentric movements can help stimulate muscle growth even with lighter weights. However, it is important to progressively increase the weight and resistance as your muscles adapt to prevent plateaus in muscle growth.
