Does it take more effort to swim in the deep end of a pool than the shallow end? - BBC Science Focus Magazine

What Makes a Swimming Pool Fast?

Divers for the Environment June 2019 by Divers for the Environment - Issuu

Why does a swimming pool apparently appear to be shallow? - Quora

The Long Swim: Lewis Pugh's daily blog, UK News

What Makes a Pool Fast? – Coach Rick – Mighty Tritons Swimming

What Makes a Swimming Pool Fast?

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Shallow End of Pool Depth - Realty Times

Zodiac Blog - What Makes a Swimming Pool Fast

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Getting faster