Common fitness myths include misconceptions such as "lifting weights will make you bulky" and "carbs should be avoided for weight loss." In reality, strength training aids in toning muscles without excessive bulk when combined with a balanced diet. Additionally, carbohydrates are essential for fueling workouts; they should be consumed in moderation, not completely eliminated. Other myths include thoughts like "spot reduction" is possible and that "more sweat equals a better workout." Education is vital for dispelling these myths and promoting evidence-based fitness practices.