IMPROVING FRONT CRAWL

Yon-Marsh
may be of interest

http://www.swimming.org/swimfit/competitive-front-crawl/
steview's picture
steview
found this pretty interesting. Especially the points on kicking:

http://triathlete-europe.competitor.com/2014/08/07/the-keys-to-swim-speed-2#gh7RBj4K98UQyJu1.99