According to USRPT
Helpful research links:
http://www.ncbi.nlm.nih.gov/pubmed/20…
http://onlinelibrary.wiley.com/doi/10…
http://bjsportmed.com/content/13/4/16…
http://www.getcited.org/pub/103342732
http://coachsci.sdsu.edu/csa/vol21/bu…
http://coachsci.sdsu.edu/swim/bullets…
http://www-rohan.sdsu.edu/dept/coachs…
http://onlinelibrary.wiley.com/doi/10…
http://coachsci.sdsu.edu/swim/trainin…
USRPT Discussion Forums:Â http://usrpt.com/forums/