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Transcript

What is the Mammalian Dive Reflex (MDR)

Welcome to Bamboo Reef!

Instructor Introduction

Student Introduction

Free Diving Level 1

Mammalian Dive Reflex

Course Overview

  • What is the the Mammalian Dive Reflex (MDR)
  • Benefits

Objectives

  • State the three components of MDR
  • Describe the benefits of the MDR

The mammalian Dive Reflex allows mammals to stay underwater for and extended period of time

Benefits of the

Mammalian Dive Reflex

Side Effects of the Mammalian Dive Reflex

Bradycardia

Facial Immersion Demo

  • Response to facial submersion in cold water
  • Heart rate slows between 10% to 50%
  • Slower heart rate reduces need for oxygen

Spleen

  • Spleen contracts and releases more red blood cells

  • More red blood cells improve the amount of oxygen the body is able to take on

Immersion Diuresis

the need to pee which can lead to dehydration

Lactic Acid Build Up

can lead to cramps

Blood Shift

  • Helps conserve oxygen
  • Better handle pressure
  • Improves freediving ability

Occurs when pressure at depth compresses the air space in the thoracic cavity

  • Helps to compensate for pressure
  • Help protect the lungs from barotrauma
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