Summarize the following:
If you're playing sports, swimming, or exercising, prevent your hair from knotting by wearing it in a braid, ponytail, or bun. The less your hair moves around and the less it gets matted with sweat and dirt, the more likely you are to be able to brush through it when you're done.  Prevent damage to your hair and scalp by positioning your buns and ponytails in different spots on your head every time, and always make sure that such hair styles are loose. When you are finished exercising, let your hair down. This will help sweat evaporate from your scalp. Whether you're going for a summer drive with the windows down or if it’s just a windy day, wrap your hair in a scarf, cover it with a hat, or wear it in a protective hair style to stop it from blowing around too much. Not only will the wind ruin your hair style, but it will also blow your tresses into a tangled mess. While cotton is a popular choice for bedding, hair can catch on cotton pillow cases as you sleep, and this can create knots. Instead, look for a polished cotton pillow case, or a smooth fabric such as silk. You can also wear a satin bonnet or wrap your hair with a protective fabric to prevent knotting when you sleep. To keep your hair healthy and remove damaged ends, you should trim your hair every eight months, but if your hair is prone to tangling, consider trimming it every three months. Removing knots can cause breakage, and frequent trims will remove split ends and broken tips, and ensure your hair stays healthy looking and radiant.

Summary:
Tie your hair up when you're being active. Protect your hair in the wind. Care for your hair when you sleep. Get regular trims.