This refers to the estimated weight of muscle within your body.

Muscle mass encompasses various types of muscles, including skeletal muscles, smooth muscles like those found in the heart and digestive system, as well as the water content within these muscles. Muscles play a pivotal role in consuming energy.

As your muscle mass increases, it boosts the rate at which you expend energy (calories). This, in turn, accelerates your basal metabolic rate (BMR), aiding in the reduction of excess body fat levels and facilitating healthy weight loss.

If you engage in intense exercise, your muscle mass may increase, potentially leading to an overall increase in your body weight. Hence, it is crucial to regularly monitor your measurements to gauge the impact of your training regimen on your muscle mass.