Here are seven important aspects of freestyle to focus on.
1. Don’t hold your breath. The feeling of being out of breath is caused by carbon-dioxide buildup in the lungs. A steady and constant exhalation out your nose and mouth while your face is in the water will prevent this unpleasant phenomenon. Inhaling on every third stroke is a good breathing pattern to use because you will breathe on both sides of your body and get plenty of oxygen.
2. Relax, relax, relax! This advice seems so simple … until you start swimming! The best swimmers in the world look like they are gliding along the surface of the water. You cannot fight the water; it will always win. Instead, relax your whole body into the water and channel your power exclusively toward moving your body forward. Practice the simple art of floating facedown on the surface.
3. Align your spine. On dry land, stand up tall and look straight ahead. Notice how your neck is in alignment with your spine and your face is pointed forward. Take that position into the water. The waterline should cut the centre of the top of your head and your face should be pointed at the bottom of the pool.
Read more on Triathlete.