The hormones used by athletes to increase the mass and strength of muscles is/are

Options

A. Estrogens
B. Gestogenes
C. Androgens
D. Both estrogens and androgens

Answer

To answer the question regarding the hormones used by athletes to increase muscle mass and strength, we can follow these steps:

### Step 1: Identify the Hormones Mentioned
The question lists several hormones: estrogens, gastrogens, androgens, and a combination of estrogens and androgens.

### Step 2: Understand the Role of Each Hormone
- **Estrogens**: These are primarily female sex hormones responsible for the development of female secondary sexual characteristics.
- **Gastrogens**: This term seems to be a typographical error or confusion with "gestogens," which are also related to female reproductive functions.
- **Androgens**: These are male sex hormones, with testosterone being the most notable. They are responsible for the development of male secondary sexual characteristics and are known to promote muscle growth.

### Step 3: Analyze the Context of the Question
The question specifically asks about hormones that athletes use to increase muscle mass and strength. Since androgens, particularly testosterone, are known to enhance muscle mass and strength, they are the most relevant hormones in this context.

### Step 4: Conclusion
Based on the analysis, the hormones used by athletes to increase muscle mass and strength are **androgens**.

### Final Answer
The hormones used by athletes to increase the mass and strength of muscles are **androgens**.

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