• Welcome to the DeeperBlue.com Forums, the largest online community dedicated to Freediving, Scuba Diving and Spearfishing. To gain full access to the DeeperBlue.com Forums you must register for a free account. As a registered member you will be able to:

    • Join over 44,280+ fellow diving enthusiasts from around the world on this forum
    • Participate in and browse from over 516,210+ posts.
    • Communicate privately with other divers from around the world.
    • Post your own photos or view from 7,441+ user submitted images.
    • All this and much more...

    You can gain access to all this absolutely free when you register for an account, so sign up today!

Mild dehydration may impair FVC and RV

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.


Feb 16, 2018
I thought this might be of interest to the freediving community:
A novel study by Marshall and colleagues indicates that mild dehydration induced by 2 hours of exercise in the heat or by 28 h of fluid restriction, respectively reducing body mass by 2.5% and 2.7%, reduced forced vital capacity (FVC) by 173 and 131 mL. It is postulated that this was consequent to small airway closure and air trapping, given that dehydration increased residual volume (see table below).
Fortunately, administration of adequate amount of fluids rapidly restored lung volumes within 15 to 60 min. Local rehydration of the airways by three 15-min bouts of nebulization did not.



Just to add an experiential thing to this, my ear tubes let me know if I'm dehydrated, I can feel the congestion.
  • Like
Reactions: Daner
DeeperBlue.com - The Worlds Largest Community Dedicated To Freediving, Scuba Diving and Spearfishing


ISSN 1469-865X | Copyright © 1996 - 2024 deeperblue.net limited.

DeeperBlue.com is the World's Largest Community dedicated to Freediving, Scuba Diving, Ocean Advocacy and Diving Travel.

We've been dedicated to bringing you the freshest news, features and discussions from around the underwater world since 1996.