1 Cup your fingers to get the most pull out of your front crawl stroke. 2  Learn to relax when you swim, and move only the parts of your body needed to complete the stroke. 3  Try to maintain a straight body position and avoid rolling from side to side, creating extra motion that slows your progress.tand on the side of the pool to practice the arm movement involved with the front crawl stroke. Bend at the hips and put both arms directly in front on you, creating a horizontal line from your hips to your fingertips.