As a fitness expert with years of experience in physical training and exercise science, I can provide you with an informed perspective on the effects of squats on thigh size.

Squats are a compound exercise that primarily targets the quadriceps, hamstrings, and gluteal muscles. The impact of squats on thigh size can vary depending on several factors, including the individual's genetics, muscle fiber composition, the type of squat performed, and the training intensity and volume.

1. Muscle Hypertrophy: When you perform squats with heavy weights and low repetitions, you are more likely to stimulate muscle growth, which can lead to an increase in thigh size. This is due to the process of muscle hypertrophy, where the muscle fibers increase in size.

2. Muscle Endurance: On the other hand, if you perform squats with lighter weights and higher repetitions, you are more likely to improve muscle endurance rather than significantly increase muscle size. This type of training can lead to a toning effect, which may not necessarily make the thighs bigger but can give them a more defined appearance.

3. Body Composition: It's also important to consider overall body composition. If you are losing body fat while performing squats, the increase in muscle mass might become more visible, giving the impression of bigger thighs. However, if you are also focusing on a caloric deficit, you might not see a significant increase in thigh size.

4. Genetics: Genetics play a significant role in determining how your muscles respond to training. Some people naturally have larger muscles and can build size more easily, while others may find it more challenging.

5. Type of Squats: The specific type of squat can also influence the outcome. For example, front squats, back squats, and goblet squats all have slightly different muscle activation patterns and can lead to different results.

In summary, whether squats make your thighs bigger or smaller depends on the training goals, the individual's response to exercise, and the overall approach to fitness and nutrition.

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