Top five tips for a long-distance swim challenge - Outdoor Swimmer Magazine
How to survive a long-distance swimming challenge - Men's Journal
How to increase the power of your swimming strokes - Quora
How long is 1 swim 'stroke'? - Quora
Smooth swimming step by step
10 Swimming Tips to Improve Every Stroke
Beginner's Guide to the Different Swimming Strokes
What is the fastest type of stroke to swim with while racing someone underwater? - Quora
How much do flippers increase swimming speed or decrease the amount of effort needed to propel oneself in the water and why? - Quora