Increasing your muscle mass will also increase yourMultiple Choicerisk of low-back pain.metabolic rate.testosterone levels.proportion of fat.

To analyze the question regarding the effects of increasing muscle mass, we need to look at what each of the given options represents and how they relate to muscle mass.

1. Risk of Low-Back Pain: While muscle strength can impact back health, increasing muscle mass does not necessarily correlate with a higher risk of low-back pain. In fact, stronger muscles can help support the spine better.

2. Metabolic Rate: Increasing muscle mass generally leads to an increased metabolic rate. Muscle tissue burns more calories at rest compared to fat tissue, thereby raising overall metabolism.

3. Testosterone Levels: Muscle mass can influence hormone production, including testosterone. However, the relationship is more complex, and increasing muscle mass alone does not guarantee an increase in testosterone levels.

4. Proportion of Fat: Typically, as muscle mass increases, the proportion of body fat can decrease, assuming diet and exercise are appropriately managed.

Final Answer

Increasing your muscle mass will also increase your metabolic rate.