“Average human beings underestimate their own latent [breath hold] capacity by about 200%,” says John McCarthy, who developed the Swim Free Confidence Underwater course with the help of lifeguards, bodysurfers, open-water swimmers, freedivers and elite surfers.

The holistic course helps participants understand their physiology — and what is happening to it — under the water...

BL Premium

This article is reserved for our subscribers.

A subscription helps you enjoy the best of our business content every day along with benefits such as exclusive Financial Times articles, ProfileData financial data, and digital access to the Sunday Times and Sunday Times Daily.

Already subscribed? Simply sign in below.

Questions or problems? Email helpdesk@businesslive.co.za or call 0860 52 52 00. Got a subscription voucher? Redeem it now