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Understanding hypercapnic 16x50

Thread Status: Hello , There was no answer in this thread for more than 60 days.
It can take a long time to get an up-to-date response or contact with relevant users.


New Member
Feb 11, 2005
Hi guys,

I'm quite new to deeperblue.net, and all the freediving I have done in the past few years, have been without any advice from anybody.

I'm now getting interested in training methods in order to improve my results, and 16x50 seems mentioned just about everywhere.
Can anybody tell me EXACTLY what this means? I'm confused..

Looking forward to some replies from the 'real' freedivers.

Best regards, Emil Jacobi :)
16X50 refers to a workout set, where you swim 50m underwater, and then repeat sixteen times, on whatever interval you are comfortable with (but not too comfortable). For instance, if you decide to start out trying a two minute interval, you start a fifty meter swim every two minutes.

Always train with a partner.
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