Bulking up, also known as muscle mass gain, is a common goal for people who wish to increase their muscle size and strength. However, not everyone may want to bulk up. For those who prefer to maintain a lean physique, there are certain antonyms that can be used to describe their goals. These may include toning, slimming down, cutting, or simply maintaining their current weight and body composition. Toning involves strengthening and shaping the muscles without adding much mass, while slimming down refers to losing excess body fat. Cutting is similar to slimming down, but it may involve a more targeted approach to reducing body fat while preserving muscle mass.