Itchy, flaky, dry skin is a common issue among fit women because they often shower twice a day — once in the morning, and once after a workout. The water washes away the natural oils in your skin that protect it from drying out. On top of that, now that cooler temps are moving in for many of us, we're indulging in longer, hotter showers to warm us up, which dries our skin out even more.
If you want to do your largest organ a favor, aim to be under the water for less than 10 minutes, and opt for warm water instead of a steaming hot stream. When you get out of the shower, pat yourself dry (don't rub), and then immediately moisturize your skin to seal in the moisture.