In the ideal situation, your heart would be beating around 120 beats per minute during your breathe up, and then as soon as you hold your breath, your heart would drop way down (to say 10-30 bpm). That is what we should try to accomplish.
Seals and other diving mammals actually reach this pattern. HR of 120+ on the surface, dropping to 10-30 upon immersion.
Eric Fattah
BC, Canada
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