That Snorkel Can Save Your Life

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Some divers just don't like to dive with a snorkel strapped to their masks. A few strap it to a leg or elsewhere, but some just won't carry a snorkel. It's a decision they may not live to regret if they have to make a long swim to their boat - or the shore.

In a recent study by N.A.M. Schellart, Ph.D., a biomedical engineering professor at Amsterdam University, nine fit divers, average age 53, took two 12 minute swim tests with and without snorkels a week apart. He used various techniques to assess variables such as drag, work of breathing, heart rate, and others. ...

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